/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:21:12,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:21:12,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:21:12,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:21:12,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:21:12,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:21:12,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:21:12,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:21:12,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:21:12,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:21:12,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:21:12,996 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:21:12,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:21:12,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:21:12,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:21:12,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:21:12,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:21:12,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:21:12,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:21:12,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:21:12,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:21:12,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:21:12,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:13,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:21:13,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:21:13,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:21:13,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:21:13,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:21:13,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:21:13,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:21:13,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:21:13,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:21:13,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:21:13,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:21:13,289 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:21:13,290 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:21:13,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-07-09 17:21:13,291 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-07-09 17:21:13,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:21:13,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:21:13,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:13,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:21:13,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:21:13,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:13,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:21:13,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:21:13,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:21:13,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... [2021-07-09 17:21:13,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:21:13,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:21:13,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:21:13,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:21:13,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:13,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:21:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:21:13,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:21:13,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:21:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:21:13,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:21:13,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:21:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:21:13,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:21:13,432 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:21:13,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:21:13,718 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:21:13,719 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:21:13,720 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:13 BoogieIcfgContainer [2021-07-09 17:21:13,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:21:13,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:21:13,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:21:13,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:21:13,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:13" (1/2) ... [2021-07-09 17:21:13,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7432b253 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:21:13, skipping insertion in model container [2021-07-09 17:21:13,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:13" (2/2) ... [2021-07-09 17:21:13,727 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-07-09 17:21:13,731 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:21:13,731 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:21:13,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:21:13,732 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:21:13,783 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:21:13,809 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:21:13,827 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:21:13,827 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:21:13,827 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:21:13,827 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:21:13,827 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:21:13,827 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:21:13,827 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:21:13,827 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:21:13,835 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-07-09 17:21:13,844 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:13,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:13,851 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:13,852 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-07-09 17:21:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:13,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542452077] [2021-07-09 17:21:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:14,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542452077] [2021-07-09 17:21:14,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542452077] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:14,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:14,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:14,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224915870] [2021-07-09 17:21:14,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:14,198 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:14,260 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-07-09 17:21:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:14,272 INFO L225 Difference]: With dead ends: 26 [2021-07-09 17:21:14,272 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:21:14,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:21:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:21:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-07-09 17:21:14,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-07-09 17:21:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-07-09 17:21:14,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-07-09 17:21:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:14,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:14,304 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:21:14,304 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-07-09 17:21:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:14,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135815717] [2021-07-09 17:21:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:14,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135815717] [2021-07-09 17:21:14,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135815717] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:14,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:14,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226368504] [2021-07-09 17:21:14,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:14,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:14,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:14,360 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:14,413 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:21:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:21:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:14,414 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:21:14,414 INFO L226 Difference]: Without dead ends: 23 [2021-07-09 17:21:14,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-07-09 17:21:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-07-09 17:21:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:21:14,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:21:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:14,419 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:21:14,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:21:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:14,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:14,420 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:14,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:21:14,420 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-07-09 17:21:14,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:14,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566462156] [2021-07-09 17:21:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:14,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566462156] [2021-07-09 17:21:14,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566462156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462353376] [2021-07-09 17:21:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:21:14,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:14,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 17:21:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462353376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:14,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452184039] [2021-07-09 17:21:14,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:14,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:14,773 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:14,861 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-07-09 17:21:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:14,863 INFO L225 Difference]: With dead ends: 30 [2021-07-09 17:21:14,864 INFO L226 Difference]: Without dead ends: 22 [2021-07-09 17:21:14,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-07-09 17:21:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-07-09 17:21:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-09 17:21:14,875 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-09 17:21:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:14,875 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-09 17:21:14,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-09 17:21:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:14,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:14,876 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:15,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:21:15,102 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-07-09 17:21:15,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:15,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650659774] [2021-07-09 17:21:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:15,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650659774] [2021-07-09 17:21:15,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650659774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564809365] [2021-07-09 17:21:15,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:15,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:15,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:21:15,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:15,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-09 17:21:15,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:15,335 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-07-09 17:21:15,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:15,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-07-09 17:21:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564809365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:15,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:15,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30040617] [2021-07-09 17:21:15,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:15,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:15,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:15,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:15,407 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:15,542 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-07-09 17:21:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:15,544 INFO L225 Difference]: With dead ends: 35 [2021-07-09 17:21:15,544 INFO L226 Difference]: Without dead ends: 30 [2021-07-09 17:21:15,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-09 17:21:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-07-09 17:21:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-09 17:21:15,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-09 17:21:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:15,548 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-09 17:21:15,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-09 17:21:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:15,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:15,548 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,768 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-07-09 17:21:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708145917] [2021-07-09 17:21:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708145917] [2021-07-09 17:21:15,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708145917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740423593] [2021-07-09 17:21:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:21:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:16,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:21:16,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:16,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-09 17:21:16,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:21:16,076 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-07-09 17:21:16,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:16,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-07-09 17:21:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740423593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:16,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562826027] [2021-07-09 17:21:16,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:16,139 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:16,302 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-07-09 17:21:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:16,308 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:21:16,308 INFO L226 Difference]: Without dead ends: 41 [2021-07-09 17:21:16,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-09 17:21:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-07-09 17:21:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-09 17:21:16,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-07-09 17:21:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:16,313 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-09 17:21:16,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-09 17:21:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:16,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:16,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:16,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:16,532 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-07-09 17:21:16,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:16,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614913351] [2021-07-09 17:21:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:16,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614913351] [2021-07-09 17:21:16,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614913351] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:16,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:16,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:21:16,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257421048] [2021-07-09 17:21:16,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:21:16,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:21:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:16,576 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:16,608 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-07-09 17:21:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:16,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:16,611 INFO L225 Difference]: With dead ends: 29 [2021-07-09 17:21:16,611 INFO L226 Difference]: Without dead ends: 29 [2021-07-09 17:21:16,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-09 17:21:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-07-09 17:21:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-07-09 17:21:16,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-07-09 17:21:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:16,615 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-07-09 17:21:16,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-07-09 17:21:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:16,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:16,616 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:16,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:21:16,616 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-07-09 17:21:16,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:16,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169095487] [2021-07-09 17:21:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:16,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169095487] [2021-07-09 17:21:16,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169095487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573527333] [2021-07-09 17:21:16,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:16,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:16,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:16,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:16,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:16,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:16,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:16,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:16,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573527333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:16,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:16,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803325232] [2021-07-09 17:21:16,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:16,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:16,956 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:17,043 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-07-09 17:21:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:17,044 INFO L225 Difference]: With dead ends: 39 [2021-07-09 17:21:17,044 INFO L226 Difference]: Without dead ends: 34 [2021-07-09 17:21:17,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-07-09 17:21:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-07-09 17:21:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-07-09 17:21:17,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-07-09 17:21:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:17,060 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-07-09 17:21:17,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-07-09 17:21:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:17,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:17,062 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,280 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-07-09 17:21:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:17,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217469016] [2021-07-09 17:21:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217469016] [2021-07-09 17:21:17,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217469016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284094190] [2021-07-09 17:21:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:17,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:21:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:17,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:17,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284094190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:17,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:21:17,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863748506] [2021-07-09 17:21:17,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:17,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:17,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:17,543 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:17,639 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-07-09 17:21:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:17,641 INFO L225 Difference]: With dead ends: 50 [2021-07-09 17:21:17,641 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 17:21:17,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 17:21:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-07-09 17:21:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-07-09 17:21:17,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-07-09 17:21:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:17,645 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-07-09 17:21:17,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-07-09 17:21:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:17,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:17,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:17,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:21:17,861 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-07-09 17:21:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:17,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086963499] [2021-07-09 17:21:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:17,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086963499] [2021-07-09 17:21:17,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086963499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528348235] [2021-07-09 17:21:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528348235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:17,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:17,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937009539] [2021-07-09 17:21:17,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:17,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:17,966 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,002 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-07-09 17:21:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,006 INFO L225 Difference]: With dead ends: 58 [2021-07-09 17:21:18,006 INFO L226 Difference]: Without dead ends: 58 [2021-07-09 17:21:18,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-09 17:21:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-07-09 17:21:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-07-09 17:21:18,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-07-09 17:21:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,010 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-07-09 17:21:18,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-07-09 17:21:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:18,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,011 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:18,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,213 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-07-09 17:21:18,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:18,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569335696] [2021-07-09 17:21:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569335696] [2021-07-09 17:21:18,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569335696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301633534] [2021-07-09 17:21:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301633534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:18,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310956807] [2021-07-09 17:21:18,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:18,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:18,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:18,314 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,363 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-07-09 17:21:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,365 INFO L225 Difference]: With dead ends: 44 [2021-07-09 17:21:18,365 INFO L226 Difference]: Without dead ends: 44 [2021-07-09 17:21:18,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-07-09 17:21:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-07-09 17:21:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-07-09 17:21:18,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-07-09 17:21:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,369 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-07-09 17:21:18,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-07-09 17:21:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:18,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,370 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:18,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,587 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:18,587 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-07-09 17:21:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:18,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144905163] [2021-07-09 17:21:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144905163] [2021-07-09 17:21:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144905163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579421870] [2021-07-09 17:21:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579421870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:18,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744654737] [2021-07-09 17:21:18,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:18,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:18,699 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,749 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-07-09 17:21:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,750 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:21:18,750 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:21:18,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:21:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-07-09 17:21:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-07-09 17:21:18,753 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-07-09 17:21:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,754 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-07-09 17:21:18,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-07-09 17:21:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:18,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,754 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:18,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:21:18,980 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-07-09 17:21:18,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:18,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359563579] [2021-07-09 17:21:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359563579] [2021-07-09 17:21:19,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359563579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674834429] [2021-07-09 17:21:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:21:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674834429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:19,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314339501] [2021-07-09 17:21:19,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:19,064 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,132 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-07-09 17:21:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,133 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:21:19,133 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 17:21:19,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 17:21:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-07-09 17:21:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-07-09 17:21:19,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-07-09 17:21:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,136 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-07-09 17:21:19,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-07-09 17:21:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:19,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,137 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:19,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,353 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-07-09 17:21:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:19,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818465655] [2021-07-09 17:21:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818465655] [2021-07-09 17:21:19,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818465655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378009830] [2021-07-09 17:21:19,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378009830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:19,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730794253] [2021-07-09 17:21:19,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:19,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:19,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:19,461 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,514 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-07-09 17:21:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,515 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:21:19,515 INFO L226 Difference]: Without dead ends: 49 [2021-07-09 17:21:19,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-09 17:21:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-07-09 17:21:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-07-09 17:21:19,518 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-07-09 17:21:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,519 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-07-09 17:21:19,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-07-09 17:21:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:19,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,519 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:19,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,729 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-07-09 17:21:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:19,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481794836] [2021-07-09 17:21:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481794836] [2021-07-09 17:21:19,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481794836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852237406] [2021-07-09 17:21:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852237406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561499875] [2021-07-09 17:21:19,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:19,843 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,882 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-07-09 17:21:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,883 INFO L225 Difference]: With dead ends: 68 [2021-07-09 17:21:19,883 INFO L226 Difference]: Without dead ends: 68 [2021-07-09 17:21:19,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-09 17:21:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-07-09 17:21:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-07-09 17:21:19,886 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-07-09 17:21:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,887 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-07-09 17:21:19,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-07-09 17:21:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:19,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,887 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:21:20,093 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-07-09 17:21:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364817257] [2021-07-09 17:21:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364817257] [2021-07-09 17:21:20,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364817257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440130993] [2021-07-09 17:21:20,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:20,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440130993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974682649] [2021-07-09 17:21:20,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:20,187 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,234 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-07-09 17:21:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,235 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:21:20,235 INFO L226 Difference]: Without dead ends: 47 [2021-07-09 17:21:20,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-09 17:21:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-07-09 17:21:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-07-09 17:21:20,237 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-07-09 17:21:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,238 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-07-09 17:21:20,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-07-09 17:21:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:20,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,238 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:21:20,463 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,463 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-07-09 17:21:20,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392865860] [2021-07-09 17:21:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392865860] [2021-07-09 17:21:20,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392865860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142920003] [2021-07-09 17:21:20,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142920003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:20,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252200632] [2021-07-09 17:21:20,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:20,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:20,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:20,557 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,611 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-07-09 17:21:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:20,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,612 INFO L225 Difference]: With dead ends: 61 [2021-07-09 17:21:20,612 INFO L226 Difference]: Without dead ends: 61 [2021-07-09 17:21:20,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-09 17:21:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-07-09 17:21:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-07-09 17:21:20,615 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-07-09 17:21:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,615 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-07-09 17:21:20,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-07-09 17:21:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:20,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,616 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:21:20,837 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-07-09 17:21:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875228049] [2021-07-09 17:21:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875228049] [2021-07-09 17:21:20,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875228049] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:20,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:20,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:21:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528226048] [2021-07-09 17:21:20,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:20,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:20,863 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,882 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-07-09 17:21:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,882 INFO L225 Difference]: With dead ends: 42 [2021-07-09 17:21:20,882 INFO L226 Difference]: Without dead ends: 36 [2021-07-09 17:21:20,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-09 17:21:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-09 17:21:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-07-09 17:21:20,885 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-07-09 17:21:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,885 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-07-09 17:21:20,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-07-09 17:21:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:20,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,886 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-07-09 17:21:20,886 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-07-09 17:21:20,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554822558] [2021-07-09 17:21:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554822558] [2021-07-09 17:21:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554822558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855521895] [2021-07-09 17:21:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855521895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:21:20,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011547130] [2021-07-09 17:21:20,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:20,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:20,978 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:21,028 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-07-09 17:21:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:21,029 INFO L225 Difference]: With dead ends: 61 [2021-07-09 17:21:21,029 INFO L226 Difference]: Without dead ends: 61 [2021-07-09 17:21:21,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-09 17:21:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-07-09 17:21:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-07-09 17:21:21,031 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-07-09 17:21:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:21,031 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-07-09 17:21:21,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-07-09 17:21:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:21,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:21,032 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:21,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,249 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-07-09 17:21:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:21,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174594124] [2021-07-09 17:21:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174594124] [2021-07-09 17:21:21,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174594124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400313873] [2021-07-09 17:21:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:21,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:21,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:21,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:21,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400313873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:21,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:21,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588508845] [2021-07-09 17:21:21,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:21,586 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:21,697 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-07-09 17:21:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:21,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:21,698 INFO L225 Difference]: With dead ends: 56 [2021-07-09 17:21:21,698 INFO L226 Difference]: Without dead ends: 46 [2021-07-09 17:21:21,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-07-09 17:21:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-07-09 17:21:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-07-09 17:21:21,701 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-07-09 17:21:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:21,701 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-07-09 17:21:21,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-07-09 17:21:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:21,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:21,702 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:21,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:21:21,905 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-07-09 17:21:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:21,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343517184] [2021-07-09 17:21:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343517184] [2021-07-09 17:21:21,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343517184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857412547] [2021-07-09 17:21:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:22,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:22,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:22,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:22,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:22,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857412547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:22,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907089339] [2021-07-09 17:21:22,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:22,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:22,219 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:22,397 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-07-09 17:21:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:22,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:22,398 INFO L225 Difference]: With dead ends: 70 [2021-07-09 17:21:22,399 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 17:21:22,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 17:21:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-07-09 17:21:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-07-09 17:21:22,404 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-07-09 17:21:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:22,404 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-07-09 17:21:22,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-07-09 17:21:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:22,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:22,407 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:22,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,621 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-07-09 17:21:22,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:22,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194414876] [2021-07-09 17:21:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194414876] [2021-07-09 17:21:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194414876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803908994] [2021-07-09 17:21:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:22,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:22,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:22,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:22,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:22,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:22,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:22,975 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:22,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:22,976 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803908994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:23,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:23,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033900186] [2021-07-09 17:21:23,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:23,007 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:23,163 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-07-09 17:21:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:23,164 INFO L225 Difference]: With dead ends: 88 [2021-07-09 17:21:23,164 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 17:21:23,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 17:21:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-07-09 17:21:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-07-09 17:21:23,167 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-07-09 17:21:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:23,167 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-07-09 17:21:23,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-07-09 17:21:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:23,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:23,168 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:23,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:23,381 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-07-09 17:21:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:23,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069525649] [2021-07-09 17:21:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069525649] [2021-07-09 17:21:23,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069525649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345975192] [2021-07-09 17:21:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:23,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:23,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:23,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:23,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:23,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:23,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:23,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:23,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:23,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345975192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:23,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:23,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162141477] [2021-07-09 17:21:23,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:23,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:23,660 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:23,819 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-07-09 17:21:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:23,821 INFO L225 Difference]: With dead ends: 76 [2021-07-09 17:21:23,821 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 17:21:23,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 17:21:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-07-09 17:21:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-07-09 17:21:23,824 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-07-09 17:21:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:23,824 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-07-09 17:21:23,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-07-09 17:21:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:23,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:23,824 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:21:24,041 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-07-09 17:21:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375131215] [2021-07-09 17:21:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375131215] [2021-07-09 17:21:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375131215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108824518] [2021-07-09 17:21:24,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:24,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:24,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:24,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:24,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:24,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:24,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:24,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:24,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:24,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:24,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:24,411 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:24,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:24,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108824518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:24,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:24,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761480953] [2021-07-09 17:21:24,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:24,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:24,441 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:24,663 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-07-09 17:21:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:24,666 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:21:24,666 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:21:24,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:21:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-07-09 17:21:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-07-09 17:21:24,670 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-07-09 17:21:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:24,670 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-07-09 17:21:24,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-07-09 17:21:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:24,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:24,671 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:24,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:21:24,885 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-07-09 17:21:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079578568] [2021-07-09 17:21:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079578568] [2021-07-09 17:21:24,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079578568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711945826] [2021-07-09 17:21:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:25,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:25,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:25,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:25,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:25,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:25,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:25,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:25,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:25,249 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:25,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:25,250 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711945826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:25,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:25,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637882963] [2021-07-09 17:21:25,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:25,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:25,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:25,280 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:25,495 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-07-09 17:21:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:25,498 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:21:25,498 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:21:25,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:21:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-07-09 17:21:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-07-09 17:21:25,501 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-07-09 17:21:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:25,501 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-07-09 17:21:25,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-07-09 17:21:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:25,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:25,501 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:25,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-07-09 17:21:25,727 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-07-09 17:21:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:25,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124943481] [2021-07-09 17:21:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124943481] [2021-07-09 17:21:25,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124943481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799339293] [2021-07-09 17:21:25,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:25,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:25,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:25,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:25,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:25,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:25,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799339293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:25,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305833317] [2021-07-09 17:21:25,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:25,976 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:26,147 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-07-09 17:21:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:26,148 INFO L225 Difference]: With dead ends: 81 [2021-07-09 17:21:26,148 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:21:26,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:21:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-07-09 17:21:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-07-09 17:21:26,151 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-07-09 17:21:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:26,151 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-07-09 17:21:26,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-07-09 17:21:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:26,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:26,152 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:26,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:26,365 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-07-09 17:21:26,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:26,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429568084] [2021-07-09 17:21:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429568084] [2021-07-09 17:21:26,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429568084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570086796] [2021-07-09 17:21:26,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:26,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:26,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:26,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:26,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:26,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:26,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:26,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:26,673 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:26,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:26,674 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570086796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310195178] [2021-07-09 17:21:26,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:26,705 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:26,963 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-07-09 17:21:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:21:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:26,964 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:21:26,965 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:21:26,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:21:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-07-09 17:21:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-07-09 17:21:26,967 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-07-09 17:21:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:26,967 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-07-09 17:21:26,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-07-09 17:21:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:26,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:26,968 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:27,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:27,189 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-07-09 17:21:27,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:27,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696876164] [2021-07-09 17:21:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:27,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:27,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696876164] [2021-07-09 17:21:27,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696876164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:27,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924854636] [2021-07-09 17:21:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:27,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:27,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:27,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:27,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:27,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:27,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:27,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,483 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:27,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:27,484 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:27,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924854636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:27,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:27,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:27,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620873507] [2021-07-09 17:21:27,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:27,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:27,538 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:27,778 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-07-09 17:21:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:27,779 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:21:27,779 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:21:27,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:21:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-07-09 17:21:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-07-09 17:21:27,781 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-07-09 17:21:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:27,782 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-07-09 17:21:27,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-07-09 17:21:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:27,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:27,782 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:28,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:21:28,008 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-07-09 17:21:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:28,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131776702] [2021-07-09 17:21:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:28,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:28,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131776702] [2021-07-09 17:21:28,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131776702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:28,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745874069] [2021-07-09 17:21:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:28,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:28,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:28,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:28,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:28,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:28,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:28,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:28,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:28,336 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:28,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:28,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745874069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:28,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:28,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110334601] [2021-07-09 17:21:28,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:28,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:28,365 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:28,647 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-07-09 17:21:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:28,648 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:21:28,648 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:21:28,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:21:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-07-09 17:21:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-07-09 17:21:28,650 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-07-09 17:21:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:28,651 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-07-09 17:21:28,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-07-09 17:21:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:28,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:28,651 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:28,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:28,852 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-07-09 17:21:28,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:28,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113058299] [2021-07-09 17:21:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:28,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:28,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113058299] [2021-07-09 17:21:28,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113058299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:28,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165566557] [2021-07-09 17:21:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:28,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:21:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:29,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:29,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165566557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:29,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094686668] [2021-07-09 17:21:29,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:29,131 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:29,296 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-07-09 17:21:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:29,297 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:21:29,298 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:21:29,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:21:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-07-09 17:21:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-07-09 17:21:29,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-07-09 17:21:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:29,300 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-07-09 17:21:29,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-07-09 17:21:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:29,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:29,301 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:29,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-07-09 17:21:29,509 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-07-09 17:21:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63652533] [2021-07-09 17:21:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63652533] [2021-07-09 17:21:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63652533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806794339] [2021-07-09 17:21:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:29,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:29,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:29,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:29,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:29,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:29,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:29,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,829 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:29,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:29,831 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806794339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:29,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206760165] [2021-07-09 17:21:29,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:29,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:29,862 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:30,142 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-07-09 17:21:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:21:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:30,144 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:21:30,144 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:21:30,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:21:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-07-09 17:21:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-07-09 17:21:30,147 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-07-09 17:21:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:30,147 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-07-09 17:21:30,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-07-09 17:21:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:30,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:30,148 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:30,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 17:21:30,361 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-07-09 17:21:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:30,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416435392] [2021-07-09 17:21:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416435392] [2021-07-09 17:21:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416435392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889177394] [2021-07-09 17:21:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:30,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:30,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:30,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:30,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:30,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:30,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:30,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:30,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:30,691 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:30,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:30,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:30,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889177394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:30,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:30,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:30,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383951971] [2021-07-09 17:21:30,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:30,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:30,722 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:30,925 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-07-09 17:21:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:30,926 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:21:30,926 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:21:30,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:21:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-07-09 17:21:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-07-09 17:21:30,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-07-09 17:21:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:30,929 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-07-09 17:21:30,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-07-09 17:21:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:30,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:30,929 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:31,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 17:21:31,136 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-07-09 17:21:31,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:31,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033816576] [2021-07-09 17:21:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033816576] [2021-07-09 17:21:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033816576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667504871] [2021-07-09 17:21:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:31,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:31,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:31,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:31,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:31,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:31,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:31,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:31,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:31,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:31,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:31,446 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:31,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:31,447 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:31,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667504871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:31,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:31,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41008320] [2021-07-09 17:21:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:31,477 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:31,740 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-07-09 17:21:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:31,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:31,741 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:21:31,741 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:21:31,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:21:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-07-09 17:21:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-07-09 17:21:31,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-07-09 17:21:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:31,744 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-07-09 17:21:31,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-07-09 17:21:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:31,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:31,745 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:31,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:31,957 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:31,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-07-09 17:21:31,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:31,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862248187] [2021-07-09 17:21:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:32,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862248187] [2021-07-09 17:21:32,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862248187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73917902] [2021-07-09 17:21:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:32,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:21:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:32,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:32,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-07-09 17:21:32,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:32,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:21:32,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:32,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:32,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:32,276 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:32,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:32,277 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-07-09 17:21:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73917902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:32,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:21:32,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919022688] [2021-07-09 17:21:32,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:21:32,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:21:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:32,306 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:32,627 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-07-09 17:21:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:32,628 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:21:32,628 INFO L226 Difference]: Without dead ends: 107 [2021-07-09 17:21:32,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-09 17:21:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-07-09 17:21:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-07-09 17:21:32,633 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-07-09 17:21:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:32,633 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-07-09 17:21:32,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-07-09 17:21:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:32,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:32,634 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:32,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 17:21:32,845 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:32,854 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-07-09 17:21:32,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:32,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694083783] [2021-07-09 17:21:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:32,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694083783] [2021-07-09 17:21:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694083783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464587339] [2021-07-09 17:21:32,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:32,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:32,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:32,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:33,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:33,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:33,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464587339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:33,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:33,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691200764] [2021-07-09 17:21:33,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:33,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:33,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:33,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:33,208 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:33,405 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-07-09 17:21:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:21:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:33,406 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:21:33,406 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:21:33,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:21:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-07-09 17:21:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-07-09 17:21:33,410 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-07-09 17:21:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:33,411 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-07-09 17:21:33,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-07-09 17:21:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:33,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:33,411 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:33,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,635 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-07-09 17:21:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:33,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554344399] [2021-07-09 17:21:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:33,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:33,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554344399] [2021-07-09 17:21:33,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554344399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417598398] [2021-07-09 17:21:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:33,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:33,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:33,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:33,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:33,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417598398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:33,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:33,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426188693] [2021-07-09 17:21:33,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:33,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:33,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:33,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:33,962 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:34,218 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-07-09 17:21:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:34,219 INFO L225 Difference]: With dead ends: 90 [2021-07-09 17:21:34,219 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:21:34,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:21:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-07-09 17:21:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-07-09 17:21:34,222 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-07-09 17:21:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:34,222 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-07-09 17:21:34,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-07-09 17:21:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:34,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:34,223 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:34,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:34,436 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-07-09 17:21:34,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:34,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367492512] [2021-07-09 17:21:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:34,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367492512] [2021-07-09 17:21:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367492512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356411678] [2021-07-09 17:21:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:34,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:34,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:34,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:34,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:34,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:34,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:34,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:34,896 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:34,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:34,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:34,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356411678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:34,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:34,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:34,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720403367] [2021-07-09 17:21:34,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:34,931 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:35,205 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-07-09 17:21:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:21:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:35,206 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:21:35,206 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:21:35,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:21:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-07-09 17:21:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-07-09 17:21:35,209 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-07-09 17:21:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:35,209 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-07-09 17:21:35,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-07-09 17:21:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:35,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:35,210 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:35,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 17:21:35,425 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:35,425 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-07-09 17:21:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:35,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166654675] [2021-07-09 17:21:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:35,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166654675] [2021-07-09 17:21:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166654675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455179311] [2021-07-09 17:21:35,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:35,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:35,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:35,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:35,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:35,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:35,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:35,848 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:35,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:35,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:35,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455179311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:35,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:35,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:21:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549424389] [2021-07-09 17:21:35,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:21:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:21:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:35,880 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:36,184 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-07-09 17:21:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:36,185 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:21:36,185 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:21:36,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:21:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-07-09 17:21:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-07-09 17:21:36,188 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-07-09 17:21:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:36,188 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-07-09 17:21:36,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-07-09 17:21:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:36,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:36,189 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:36,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-09 17:21:36,405 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-07-09 17:21:36,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:36,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589637047] [2021-07-09 17:21:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589637047] [2021-07-09 17:21:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589637047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114129989] [2021-07-09 17:21:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:36,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:36,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114129989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:36,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633987409] [2021-07-09 17:21:36,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:36,499 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:36,547 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-07-09 17:21:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:36,548 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:21:36,548 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:21:36,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:21:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-07-09 17:21:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-07-09 17:21:36,552 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-07-09 17:21:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:36,552 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-07-09 17:21:36,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-07-09 17:21:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:36,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:36,552 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:36,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-09 17:21:36,776 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-07-09 17:21:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052059918] [2021-07-09 17:21:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052059918] [2021-07-09 17:21:36,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052059918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183999601] [2021-07-09 17:21:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:36,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:36,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:37,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:37,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:37,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:37,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183999601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:37,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:37,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136105677] [2021-07-09 17:21:37,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:37,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:37,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:37,104 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:37,370 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-07-09 17:21:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:37,371 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:21:37,371 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:21:37,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:21:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-07-09 17:21:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-07-09 17:21:37,374 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-07-09 17:21:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:37,374 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-07-09 17:21:37,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-07-09 17:21:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:37,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:37,375 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:37,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:37,596 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-07-09 17:21:37,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:37,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948151611] [2021-07-09 17:21:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948151611] [2021-07-09 17:21:37,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948151611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297460541] [2021-07-09 17:21:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:37,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:37,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:37,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:37,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:37,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:38,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:38,063 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:38,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:38,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:38,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297460541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:38,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:38,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:38,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555523072] [2021-07-09 17:21:38,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:38,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:38,098 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:38,369 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-07-09 17:21:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:38,370 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:21:38,370 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 17:21:38,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 17:21:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-07-09 17:21:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-07-09 17:21:38,374 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-07-09 17:21:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:38,374 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-07-09 17:21:38,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-07-09 17:21:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:38,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:38,374 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:38,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-09 17:21:38,589 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:38,589 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-07-09 17:21:38,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:38,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133978547] [2021-07-09 17:21:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:38,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133978547] [2021-07-09 17:21:38,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133978547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925870126] [2021-07-09 17:21:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:38,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:38,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:38,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:38,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:38,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:38,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:39,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:39,041 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:39,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:39,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925870126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:39,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:39,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:39,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521790717] [2021-07-09 17:21:39,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:39,074 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:39,397 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-07-09 17:21:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:39,398 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:21:39,398 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:21:39,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:21:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-07-09 17:21:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-07-09 17:21:39,401 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-07-09 17:21:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:39,401 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-07-09 17:21:39,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-07-09 17:21:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:39,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:39,402 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:39,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-09 17:21:39,619 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-07-09 17:21:39,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:39,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952089858] [2021-07-09 17:21:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:39,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952089858] [2021-07-09 17:21:39,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952089858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202254270] [2021-07-09 17:21:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:39,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:39,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:39,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:39,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:39,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:39,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:39,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:40,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:40,091 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:40,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:40,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:40,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202254270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:40,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:40,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:40,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545851324] [2021-07-09 17:21:40,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:40,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:40,122 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:40,591 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-07-09 17:21:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:21:40,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:40,593 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:21:40,593 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:21:40,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:21:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:21:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-07-09 17:21:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-07-09 17:21:40,596 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-07-09 17:21:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:40,597 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-07-09 17:21:40,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-07-09 17:21:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:40,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:40,597 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:40,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-09 17:21:40,821 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-07-09 17:21:40,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:40,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874258235] [2021-07-09 17:21:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:40,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874258235] [2021-07-09 17:21:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874258235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319273769] [2021-07-09 17:21:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:40,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319273769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:40,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:40,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:40,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242189918] [2021-07-09 17:21:40,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:40,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:40,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:40,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:40,920 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:40,994 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-07-09 17:21:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:40,996 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:21:40,996 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:21:40,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:21:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-07-09 17:21:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-07-09 17:21:41,000 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-07-09 17:21:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:41,000 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-07-09 17:21:41,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-07-09 17:21:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:41,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:41,000 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:41,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:41,225 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-07-09 17:21:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633946652] [2021-07-09 17:21:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:41,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:41,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633946652] [2021-07-09 17:21:41,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633946652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:41,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532519127] [2021-07-09 17:21:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:41,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:41,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:41,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:41,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:41,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:41,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:41,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:41,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532519127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:41,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294571965] [2021-07-09 17:21:41,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:41,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:41,529 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:41,781 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-07-09 17:21:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:41,783 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:21:41,783 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:21:41,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:21:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-07-09 17:21:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-07-09 17:21:41,787 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-07-09 17:21:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:41,788 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-07-09 17:21:41,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-07-09 17:21:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:41,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:41,788 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:42,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:42,012 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-07-09 17:21:42,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:42,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277322794] [2021-07-09 17:21:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:42,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:42,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277322794] [2021-07-09 17:21:42,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277322794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:42,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016611051] [2021-07-09 17:21:42,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:42,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:42,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:42,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:42,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:42,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:42,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:42,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:42,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:42,471 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:42,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:42,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016611051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:42,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:42,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882012609] [2021-07-09 17:21:42,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:42,508 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:42,857 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-07-09 17:21:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:42,858 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:21:42,858 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:21:42,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:21:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:21:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-07-09 17:21:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-07-09 17:21:42,862 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-07-09 17:21:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:42,862 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-07-09 17:21:42,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-07-09 17:21:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:42,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:42,863 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:43,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:43,077 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-07-09 17:21:43,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:43,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992927556] [2021-07-09 17:21:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:43,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992927556] [2021-07-09 17:21:43,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992927556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569921175] [2021-07-09 17:21:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:43,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:43,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:43,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:43,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:43,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:43,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:43,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:43,495 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:43,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:43,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569921175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635440291] [2021-07-09 17:21:43,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:43,524 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:43,925 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-07-09 17:21:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:43,927 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:21:43,927 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:21:43,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:21:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:21:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-07-09 17:21:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-07-09 17:21:43,930 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-07-09 17:21:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:43,930 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-07-09 17:21:43,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-07-09 17:21:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:43,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:43,931 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:44,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 17:21:44,145 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-07-09 17:21:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:44,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174837352] [2021-07-09 17:21:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:44,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174837352] [2021-07-09 17:21:44,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174837352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198988987] [2021-07-09 17:21:44,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:44,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:44,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:44,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:44,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:44,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:44,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:44,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:44,581 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:44,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:44,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:44,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198988987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:44,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:44,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:44,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027283168] [2021-07-09 17:21:44,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:44,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:44,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:44,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:44,617 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:45,141 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-07-09 17:21:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:45,142 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:21:45,142 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:21:45,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:21:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:21:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-07-09 17:21:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-07-09 17:21:45,146 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-07-09 17:21:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:45,146 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-07-09 17:21:45,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-07-09 17:21:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:45,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:45,146 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:45,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-09 17:21:45,361 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-07-09 17:21:45,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:45,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705588669] [2021-07-09 17:21:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705588669] [2021-07-09 17:21:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705588669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193156440] [2021-07-09 17:21:45,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:45,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:45,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:45,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:45,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:45,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:45,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:45,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:45,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:45,795 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:45,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:45,796 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:45,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193156440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:45,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:45,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:45,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783651904] [2021-07-09 17:21:45,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:45,833 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:46,237 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-07-09 17:21:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:46,238 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:21:46,238 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:21:46,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:21:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:21:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-07-09 17:21:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-07-09 17:21:46,241 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-07-09 17:21:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:46,242 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-07-09 17:21:46,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-07-09 17:21:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:46,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:46,242 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:46,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-07-09 17:21:46,465 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-07-09 17:21:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:46,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939237370] [2021-07-09 17:21:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:46,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:46,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939237370] [2021-07-09 17:21:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939237370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:46,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691874591] [2021-07-09 17:21:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691874591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:46,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:46,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182883340] [2021-07-09 17:21:46,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:46,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:46,589 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:46,674 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-07-09 17:21:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:46,675 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:21:46,675 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:21:46,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:21:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-07-09 17:21:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-07-09 17:21:46,679 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-07-09 17:21:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:46,679 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-07-09 17:21:46,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-07-09 17:21:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:46,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:46,679 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:46,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-07-09 17:21:46,885 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-07-09 17:21:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:46,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233241686] [2021-07-09 17:21:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:46,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:46,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233241686] [2021-07-09 17:21:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233241686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:46,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408663679] [2021-07-09 17:21:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:47,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:47,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:47,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:47,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:47,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:47,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:47,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408663679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:47,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:47,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:47,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625241268] [2021-07-09 17:21:47,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:47,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:47,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:47,199 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:47,369 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-07-09 17:21:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:47,370 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:21:47,370 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:21:47,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:21:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-07-09 17:21:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-07-09 17:21:47,373 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-07-09 17:21:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:47,373 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-07-09 17:21:47,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-07-09 17:21:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:47,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:47,374 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-07-09 17:21:47,589 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-07-09 17:21:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83489394] [2021-07-09 17:21:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:47,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83489394] [2021-07-09 17:21:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83489394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068314232] [2021-07-09 17:21:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:47,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:47,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:47,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:47,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:47,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:47,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:47,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:47,970 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:47,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:47,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:47,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068314232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:47,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:47,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:47,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877087656] [2021-07-09 17:21:47,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:47,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:47,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:47,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:47,999 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:48,306 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-07-09 17:21:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:48,308 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:21:48,308 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:21:48,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:21:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-07-09 17:21:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-07-09 17:21:48,311 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-07-09 17:21:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:48,311 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-07-09 17:21:48,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-07-09 17:21:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:48,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:48,312 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:48,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:48,529 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-07-09 17:21:48,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:48,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333787004] [2021-07-09 17:21:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:48,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:48,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333787004] [2021-07-09 17:21:48,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333787004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:48,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603049679] [2021-07-09 17:21:48,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:48,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:48,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:48,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:48,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:48,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:48,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:48,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:48,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:48,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:48,932 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:48,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:48,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:48,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603049679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:48,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:48,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798980057] [2021-07-09 17:21:48,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:48,965 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:49,410 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-07-09 17:21:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:21:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:49,411 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:21:49,411 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:21:49,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:21:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:21:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-07-09 17:21:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-07-09 17:21:49,414 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-07-09 17:21:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:49,414 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-07-09 17:21:49,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-07-09 17:21:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:49,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:49,414 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:49,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:49,621 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-07-09 17:21:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:49,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118107012] [2021-07-09 17:21:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:49,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118107012] [2021-07-09 17:21:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118107012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931590976] [2021-07-09 17:21:49,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:49,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:49,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931590976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:49,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:49,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708633734] [2021-07-09 17:21:49,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:49,700 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:49,734 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-07-09 17:21:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:49,735 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:21:49,735 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:21:49,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:21:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-07-09 17:21:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-07-09 17:21:49,739 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-07-09 17:21:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:49,739 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-07-09 17:21:49,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-07-09 17:21:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:49,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:49,740 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:49,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-07-09 17:21:49,961 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-07-09 17:21:49,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:49,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570750862] [2021-07-09 17:21:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570750862] [2021-07-09 17:21:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570750862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661798125] [2021-07-09 17:21:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:50,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:50,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:50,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:50,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:50,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:50,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:50,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:50,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:50,374 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:50,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:50,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661798125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:50,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053545352] [2021-07-09 17:21:50,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:50,407 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:50,876 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-07-09 17:21:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:50,877 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:21:50,877 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:21:50,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:21:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:21:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-07-09 17:21:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-07-09 17:21:50,881 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-07-09 17:21:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-07-09 17:21:50,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-07-09 17:21:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:50,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:50,881 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:51,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-07-09 17:21:51,097 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-07-09 17:21:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:51,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180860835] [2021-07-09 17:21:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:51,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180860835] [2021-07-09 17:21:51,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180860835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907240234] [2021-07-09 17:21:51,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907240234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:51,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535405021] [2021-07-09 17:21:51,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:51,186 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:51,251 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-07-09 17:21:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:51,260 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:21:51,260 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:21:51,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:21:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-07-09 17:21:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-07-09 17:21:51,263 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-07-09 17:21:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:51,264 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-07-09 17:21:51,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-07-09 17:21:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:51,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:51,264 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:51,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:51,469 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:51,470 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-07-09 17:21:51,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:51,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155375132] [2021-07-09 17:21:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155375132] [2021-07-09 17:21:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155375132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945183101] [2021-07-09 17:21:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:51,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:51,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:51,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:51,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:51,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:51,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:51,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:51,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:51,913 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:51,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:51,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945183101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:51,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:51,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113710715] [2021-07-09 17:21:51,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:51,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:51,944 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:52,442 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-07-09 17:21:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:52,443 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:21:52,443 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:21:52,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:21:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:21:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-07-09 17:21:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-07-09 17:21:52,450 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-07-09 17:21:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:52,451 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-07-09 17:21:52,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-07-09 17:21:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:52,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:52,451 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:52,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:52,665 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-07-09 17:21:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:52,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135738737] [2021-07-09 17:21:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:52,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:52,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135738737] [2021-07-09 17:21:52,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135738737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:52,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749203231] [2021-07-09 17:21:52,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:52,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:52,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749203231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:52,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:52,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:52,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132423100] [2021-07-09 17:21:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:52,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:52,776 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:52,872 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-07-09 17:21:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:52,874 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:21:52,874 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:21:52,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:21:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-07-09 17:21:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-07-09 17:21:52,876 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-07-09 17:21:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:52,876 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-07-09 17:21:52,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-07-09 17:21:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:52,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:52,876 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:53,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable819 [2021-07-09 17:21:53,085 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-07-09 17:21:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830279496] [2021-07-09 17:21:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:53,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830279496] [2021-07-09 17:21:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830279496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756865094] [2021-07-09 17:21:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:53,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:53,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:53,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:21:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:53,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:53,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:53,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:53,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:53,545 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:21:53,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:53,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-07-09 17:21:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756865094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:53,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:53,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558834313] [2021-07-09 17:21:53,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:53,572 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:54,003 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-07-09 17:21:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:54,004 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:21:54,004 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:21:54,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:21:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:21:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-07-09 17:21:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-07-09 17:21:54,007 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-07-09 17:21:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:54,007 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-07-09 17:21:54,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-07-09 17:21:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:54,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:54,008 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:54,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-07-09 17:21:54,222 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-07-09 17:21:54,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:54,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182572891] [2021-07-09 17:21:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182572891] [2021-07-09 17:21:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182572891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705099067] [2021-07-09 17:21:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705099067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:54,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:54,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641542427] [2021-07-09 17:21:54,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:54,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:54,338 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:54,437 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-07-09 17:21:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:54,438 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:21:54,438 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:21:54,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:21:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-07-09 17:21:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-07-09 17:21:54,441 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-07-09 17:21:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:54,441 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-07-09 17:21:54,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-07-09 17:21:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:54,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:54,442 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:54,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,657 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-07-09 17:21:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453807541] [2021-07-09 17:21:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:54,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453807541] [2021-07-09 17:21:54,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453807541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479377046] [2021-07-09 17:21:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:21:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:54,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:54,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:54,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:54,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:54,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:54,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479377046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:54,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:54,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067623996] [2021-07-09 17:21:54,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:54,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:54,992 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:55,200 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-07-09 17:21:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:21:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:55,201 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:21:55,201 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:21:55,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:21:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-07-09 17:21:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-07-09 17:21:55,204 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-07-09 17:21:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,204 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-07-09 17:21:55,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-07-09 17:21:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:55,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,205 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:55,409 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-07-09 17:21:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718342339] [2021-07-09 17:21:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:55,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718342339] [2021-07-09 17:21:55,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718342339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803331443] [2021-07-09 17:21:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:21:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:55,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:55,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:55,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:55,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:55,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:55,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803331443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:55,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:55,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958839323] [2021-07-09 17:21:55,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:55,764 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:56,044 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-07-09 17:21:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:56,045 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:21:56,045 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:21:56,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:21:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-07-09 17:21:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-07-09 17:21:56,050 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-07-09 17:21:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:56,050 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-07-09 17:21:56,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-07-09 17:21:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:56,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:56,051 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:56,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,265 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-07-09 17:21:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:56,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885100116] [2021-07-09 17:21:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885100116] [2021-07-09 17:21:56,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885100116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156264557] [2021-07-09 17:21:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:56,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156264557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38924083] [2021-07-09 17:21:56,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:56,354 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:56,397 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-07-09 17:21:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:56,398 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:21:56,398 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:21:56,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:21:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-07-09 17:21:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-07-09 17:21:56,402 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-07-09 17:21:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:56,402 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-07-09 17:21:56,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-07-09 17:21:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:56,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:56,402 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:56,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-07-09 17:21:56,605 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-07-09 17:21:56,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:56,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083447774] [2021-07-09 17:21:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083447774] [2021-07-09 17:21:56,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083447774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709291177] [2021-07-09 17:21:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:56,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709291177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:56,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457849084] [2021-07-09 17:21:56,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:56,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:56,901 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,089 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-07-09 17:21:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,090 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:21:57,090 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:21:57,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:21:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-07-09 17:21:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-07-09 17:21:57,092 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-07-09 17:21:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,092 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-07-09 17:21:57,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-07-09 17:21:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:57,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,093 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:57,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:57,294 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-07-09 17:21:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:57,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047748689] [2021-07-09 17:21:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047748689] [2021-07-09 17:21:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047748689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556340673] [2021-07-09 17:21:57,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:57,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:57,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:21:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556340673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:57,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:21:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958954184] [2021-07-09 17:21:57,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:57,435 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,498 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-07-09 17:21:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,500 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:21:57,500 INFO L226 Difference]: Without dead ends: 272 [2021-07-09 17:21:57,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-09 17:21:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-07-09 17:21:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-07-09 17:21:57,504 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-07-09 17:21:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,504 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-07-09 17:21:57,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-07-09 17:21:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:57,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,504 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:57,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-07-09 17:21:57,729 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-07-09 17:21:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:57,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406751864] [2021-07-09 17:21:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:57,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406751864] [2021-07-09 17:21:57,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406751864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044925362] [2021-07-09 17:21:57,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:57,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:21:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:58,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:58,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044925362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367511326] [2021-07-09 17:21:58,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:58,064 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,228 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-07-09 17:21:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,229 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:21:58,229 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:21:58,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:21:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-07-09 17:21:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-07-09 17:21:58,239 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-07-09 17:21:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,239 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-07-09 17:21:58,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-07-09 17:21:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:58,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,240 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,460 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-07-09 17:21:58,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560844481] [2021-07-09 17:21:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560844481] [2021-07-09 17:21:58,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560844481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798489299] [2021-07-09 17:21:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:58,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798489299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:21:58,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595832195] [2021-07-09 17:21:58,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:58,562 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,625 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-07-09 17:21:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:58,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,627 INFO L225 Difference]: With dead ends: 271 [2021-07-09 17:21:58,627 INFO L226 Difference]: Without dead ends: 271 [2021-07-09 17:21:58,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-09 17:21:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-07-09 17:21:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-07-09 17:21:58,631 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-07-09 17:21:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,631 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-07-09 17:21:58,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-07-09 17:21:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:58,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,632 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-07-09 17:21:58,849 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-07-09 17:21:58,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033696385] [2021-07-09 17:21:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033696385] [2021-07-09 17:21:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033696385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90835221] [2021-07-09 17:21:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90835221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:21:58,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545362719] [2021-07-09 17:21:58,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:21:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:21:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:58,937 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,028 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-07-09 17:21:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,037 INFO L225 Difference]: With dead ends: 294 [2021-07-09 17:21:59,037 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:21:59,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:21:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-07-09 17:21:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-07-09 17:21:59,041 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-07-09 17:21:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,041 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-07-09 17:21:59,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-07-09 17:21:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:59,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,042 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:59,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,265 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-07-09 17:21:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:59,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977955227] [2021-07-09 17:21:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977955227] [2021-07-09 17:21:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977955227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220827324] [2021-07-09 17:21:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:59,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:21:59,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:59,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:59,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:59,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:59,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220827324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:21:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395729623] [2021-07-09 17:21:59,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:59,611 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,718 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-07-09 17:21:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,719 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:21:59,719 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:21:59,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:21:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-07-09 17:21:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-07-09 17:21:59,721 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-07-09 17:21:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,721 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-07-09 17:21:59,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-07-09 17:21:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:59,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,722 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:59,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,929 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-07-09 17:21:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:59,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827097825] [2021-07-09 17:21:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:59,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:59,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827097825] [2021-07-09 17:21:59,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827097825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210260953] [2021-07-09 17:21:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:59,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:59,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:21:59,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:00,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210260953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:22:00,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581918516] [2021-07-09 17:22:00,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:00,017 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,047 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-07-09 17:22:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,048 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:22:00,049 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:22:00,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:22:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-07-09 17:22:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-07-09 17:22:00,051 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-07-09 17:22:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,051 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-07-09 17:22:00,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-07-09 17:22:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:00,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,052 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-07-09 17:22:00,252 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-07-09 17:22:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932379567] [2021-07-09 17:22:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932379567] [2021-07-09 17:22:00,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932379567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236089930] [2021-07-09 17:22:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236089930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150993300] [2021-07-09 17:22:00,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:00,345 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,413 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-07-09 17:22:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,414 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:22:00,414 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:22:00,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:22:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-07-09 17:22:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-07-09 17:22:00,417 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-07-09 17:22:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,418 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-07-09 17:22:00,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-07-09 17:22:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:00,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,418 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-07-09 17:22:00,619 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-07-09 17:22:00,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301507599] [2021-07-09 17:22:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301507599] [2021-07-09 17:22:00,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301507599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783259294] [2021-07-09 17:22:00,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:00,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783259294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13900091] [2021-07-09 17:22:00,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:00,712 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,801 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-07-09 17:22:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,803 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:22:00,803 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:22:00,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:22:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-07-09 17:22:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-07-09 17:22:00,806 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-07-09 17:22:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,806 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-07-09 17:22:00,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-07-09 17:22:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:00,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,807 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,021 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-07-09 17:22:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:01,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517252632] [2021-07-09 17:22:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517252632] [2021-07-09 17:22:01,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517252632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743199294] [2021-07-09 17:22:01,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:01,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743199294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:01,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:01,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197305521] [2021-07-09 17:22:01,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:01,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:01,124 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:01,236 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-07-09 17:22:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:01,237 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:22:01,237 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:22:01,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:22:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-07-09 17:22:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-07-09 17:22:01,240 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-07-09 17:22:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:01,240 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-07-09 17:22:01,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-07-09 17:22:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:01,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:01,241 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:01,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-07-09 17:22:01,464 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-07-09 17:22:01,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:01,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770577702] [2021-07-09 17:22:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:01,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770577702] [2021-07-09 17:22:01,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770577702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152171182] [2021-07-09 17:22:01,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:22:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:01,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:01,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152171182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:01,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377565262] [2021-07-09 17:22:01,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:01,865 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:02,042 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-07-09 17:22:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:02,044 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:22:02,044 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:22:02,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:22:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-07-09 17:22:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-07-09 17:22:02,046 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-07-09 17:22:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,046 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-07-09 17:22:02,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-07-09 17:22:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:02,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,047 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-07-09 17:22:02,247 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-07-09 17:22:02,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492013730] [2021-07-09 17:22:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492013730] [2021-07-09 17:22:02,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492013730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624576508] [2021-07-09 17:22:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:22:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:02,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:02,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624576508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:02,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:22:02,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763060962] [2021-07-09 17:22:02,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:02,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:02,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:02,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:02,591 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:02,832 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-07-09 17:22:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:02,833 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:22:02,833 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:22:02,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:22:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-07-09 17:22:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-07-09 17:22:02,835 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-07-09 17:22:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,835 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-07-09 17:22:02,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-07-09 17:22:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:02,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,836 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-07-09 17:22:03,037 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-07-09 17:22:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090275958] [2021-07-09 17:22:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090275958] [2021-07-09 17:22:03,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090275958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171238002] [2021-07-09 17:22:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171238002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518606487] [2021-07-09 17:22:03,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:03,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:03,136 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,189 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-07-09 17:22:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,190 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:22:03,190 INFO L226 Difference]: Without dead ends: 269 [2021-07-09 17:22:03,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-09 17:22:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-07-09 17:22:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-07-09 17:22:03,193 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-07-09 17:22:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,193 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-07-09 17:22:03,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-07-09 17:22:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:03,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,194 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,395 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-07-09 17:22:03,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749945604] [2021-07-09 17:22:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749945604] [2021-07-09 17:22:03,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749945604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695318245] [2021-07-09 17:22:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:03,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695318245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:03,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81690828] [2021-07-09 17:22:03,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:03,580 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,630 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-07-09 17:22:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,632 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:22:03,632 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:22:03,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:22:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-07-09 17:22:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-07-09 17:22:03,635 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-07-09 17:22:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,635 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-07-09 17:22:03,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-07-09 17:22:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:03,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,636 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,860 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-07-09 17:22:03,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883890698] [2021-07-09 17:22:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883890698] [2021-07-09 17:22:03,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883890698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609898425] [2021-07-09 17:22:03,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609898425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:03,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65461417] [2021-07-09 17:22:03,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:03,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:03,951 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,026 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-07-09 17:22:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,028 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:22:04,028 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:22:04,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:22:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-07-09 17:22:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-07-09 17:22:04,032 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-07-09 17:22:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,032 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-07-09 17:22:04,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-07-09 17:22:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:04,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,033 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,257 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-07-09 17:22:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023898031] [2021-07-09 17:22:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023898031] [2021-07-09 17:22:04,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023898031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78247164] [2021-07-09 17:22:04,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78247164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:04,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620686719] [2021-07-09 17:22:04,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:04,361 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,467 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-07-09 17:22:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,469 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:22:04,469 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:22:04,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:22:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-07-09 17:22:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-07-09 17:22:04,478 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-07-09 17:22:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,478 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-07-09 17:22:04,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-07-09 17:22:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:22:04,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,479 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,694 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-07-09 17:22:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759090507] [2021-07-09 17:22:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759090507] [2021-07-09 17:22:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759090507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337417041] [2021-07-09 17:22:04,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337417041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:04,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721632541] [2021-07-09 17:22:04,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:04,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:04,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:04,804 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,907 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-07-09 17:22:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:22:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,908 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:22:04,908 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:22:04,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:22:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-07-09 17:22:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-07-09 17:22:04,911 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-07-09 17:22:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,911 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-07-09 17:22:04,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-07-09 17:22:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:04,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,912 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:05,113 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-07-09 17:22:05,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232272589] [2021-07-09 17:22:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232272589] [2021-07-09 17:22:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232272589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094646910] [2021-07-09 17:22:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:05,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094646910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912166025] [2021-07-09 17:22:05,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:05,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:05,242 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:05,326 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-07-09 17:22:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:05,327 INFO L225 Difference]: With dead ends: 282 [2021-07-09 17:22:05,327 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:22:05,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:22:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-07-09 17:22:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-07-09 17:22:05,331 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-07-09 17:22:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:05,331 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-07-09 17:22:05,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-07-09 17:22:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:05,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:05,332 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-07-09 17:22:05,537 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-07-09 17:22:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157043197] [2021-07-09 17:22:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157043197] [2021-07-09 17:22:05,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157043197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944161250] [2021-07-09 17:22:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:05,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:05,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:05,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944161250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:05,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974286979] [2021-07-09 17:22:05,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:05,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:05,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:05,648 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:05,792 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-07-09 17:22:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:05,794 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:22:05,794 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:22:05,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:22:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-07-09 17:22:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-07-09 17:22:05,799 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-07-09 17:22:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:05,799 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-07-09 17:22:05,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-07-09 17:22:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:05,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:05,799 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-07-09 17:22:06,017 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-07-09 17:22:06,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446155666] [2021-07-09 17:22:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446155666] [2021-07-09 17:22:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446155666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712484622] [2021-07-09 17:22:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712484622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28915440] [2021-07-09 17:22:06,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:06,112 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,213 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-07-09 17:22:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,214 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:22:06,214 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:22:06,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:22:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-07-09 17:22:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-07-09 17:22:06,217 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-07-09 17:22:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,217 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-07-09 17:22:06,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-07-09 17:22:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:06,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,218 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-07-09 17:22:06,433 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-07-09 17:22:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232550118] [2021-07-09 17:22:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232550118] [2021-07-09 17:22:06,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232550118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553123472] [2021-07-09 17:22:06,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:06,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553123472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578926911] [2021-07-09 17:22:06,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:06,545 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,593 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-07-09 17:22:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,594 INFO L225 Difference]: With dead ends: 310 [2021-07-09 17:22:06,594 INFO L226 Difference]: Without dead ends: 310 [2021-07-09 17:22:06,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-09 17:22:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-07-09 17:22:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-07-09 17:22:06,598 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-07-09 17:22:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,598 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-07-09 17:22:06,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-07-09 17:22:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:06,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,599 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1058,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,818 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-07-09 17:22:06,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862179633] [2021-07-09 17:22:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862179633] [2021-07-09 17:22:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862179633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557438078] [2021-07-09 17:22:06,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:06,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557438078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:06,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102068004] [2021-07-09 17:22:06,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:06,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:06,923 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,019 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-07-09 17:22:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,020 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:22:07,020 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:22:07,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:22:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-07-09 17:22:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-07-09 17:22:07,025 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-07-09 17:22:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,025 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-07-09 17:22:07,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-07-09 17:22:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:07,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,026 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-07-09 17:22:07,252 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-07-09 17:22:07,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002517695] [2021-07-09 17:22:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:07,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002517695] [2021-07-09 17:22:07,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002517695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923176945] [2021-07-09 17:22:07,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923176945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:07,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263436518] [2021-07-09 17:22:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:07,347 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,411 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-07-09 17:22:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,413 INFO L225 Difference]: With dead ends: 333 [2021-07-09 17:22:07,413 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 17:22:07,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 17:22:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-07-09 17:22:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-07-09 17:22:07,417 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-07-09 17:22:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,417 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-07-09 17:22:07,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-07-09 17:22:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:07,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,418 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,619 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-07-09 17:22:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622230171] [2021-07-09 17:22:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622230171] [2021-07-09 17:22:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622230171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341159562] [2021-07-09 17:22:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341159562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719054085] [2021-07-09 17:22:07,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:07,732 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,806 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-07-09 17:22:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,807 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:22:07,807 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:22:07,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:22:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-07-09 17:22:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-07-09 17:22:07,812 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-07-09 17:22:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,812 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-07-09 17:22:07,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-07-09 17:22:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:07,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,813 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:08,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,025 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-07-09 17:22:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024236734] [2021-07-09 17:22:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024236734] [2021-07-09 17:22:08,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024236734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084445358] [2021-07-09 17:22:08,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084445358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:08,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008540609] [2021-07-09 17:22:08,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:08,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:08,157 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:08,265 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-07-09 17:22:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:08,267 INFO L225 Difference]: With dead ends: 348 [2021-07-09 17:22:08,267 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:22:08,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:22:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-07-09 17:22:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-07-09 17:22:08,272 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-07-09 17:22:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:08,272 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-07-09 17:22:08,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-07-09 17:22:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:08,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:08,273 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:08,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,493 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-07-09 17:22:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229780618] [2021-07-09 17:22:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:08,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229780618] [2021-07-09 17:22:08,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229780618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127784758] [2021-07-09 17:22:08,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:08,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:08,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127784758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:22:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229719180] [2021-07-09 17:22:08,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:08,574 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:08,624 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-07-09 17:22:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:08,625 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:22:08,625 INFO L226 Difference]: Without dead ends: 328 [2021-07-09 17:22:08,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-09 17:22:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-07-09 17:22:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-07-09 17:22:08,629 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-07-09 17:22:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:08,629 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-07-09 17:22:08,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-07-09 17:22:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:08,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:08,630 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:08,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1063 [2021-07-09 17:22:08,845 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-07-09 17:22:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:08,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800487936] [2021-07-09 17:22:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:08,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800487936] [2021-07-09 17:22:08,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800487936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593966070] [2021-07-09 17:22:08,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:08,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593966070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:22:08,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863801849] [2021-07-09 17:22:08,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:22:08,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:22:08,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:22:08,934 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,012 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-07-09 17:22:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,014 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:22:09,014 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:22:09,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:22:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-07-09 17:22:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-07-09 17:22:09,017 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-07-09 17:22:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,017 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-07-09 17:22:09,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-07-09 17:22:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:09,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,018 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,219 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-07-09 17:22:09,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054349039] [2021-07-09 17:22:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:09,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054349039] [2021-07-09 17:22:09,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054349039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396977972] [2021-07-09 17:22:09,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:09,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396977972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:09,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132712849] [2021-07-09 17:22:09,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:09,301 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,352 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-07-09 17:22:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,354 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:22:09,354 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:22:09,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:22:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-07-09 17:22:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-07-09 17:22:09,357 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-07-09 17:22:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,357 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-07-09 17:22:09,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-07-09 17:22:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:09,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,358 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,559 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-07-09 17:22:09,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394800315] [2021-07-09 17:22:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:09,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394800315] [2021-07-09 17:22:09,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394800315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356526042] [2021-07-09 17:22:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:09,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356526042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:09,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350546196] [2021-07-09 17:22:09,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:09,685 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,785 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-07-09 17:22:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,787 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:22:09,787 INFO L226 Difference]: Without dead ends: 299 [2021-07-09 17:22:09,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-09 17:22:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-07-09 17:22:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-07-09 17:22:09,792 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-07-09 17:22:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,793 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-07-09 17:22:09,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-07-09 17:22:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:09,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,793 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:10,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-07-09 17:22:10,013 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-07-09 17:22:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:10,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44390] [2021-07-09 17:22:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44390] [2021-07-09 17:22:10,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223245429] [2021-07-09 17:22:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:10,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223245429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541041067] [2021-07-09 17:22:10,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:10,120 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:10,216 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-07-09 17:22:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:10,218 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:22:10,218 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 17:22:10,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 17:22:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-07-09 17:22:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-07-09 17:22:10,223 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-07-09 17:22:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:10,223 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-07-09 17:22:10,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-07-09 17:22:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:10,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:10,224 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-07-09 17:22:10,445 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-07-09 17:22:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654642949] [2021-07-09 17:22:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654642949] [2021-07-09 17:22:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654642949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187887753] [2021-07-09 17:22:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:10,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187887753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:10,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157079882] [2021-07-09 17:22:10,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:10,556 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:10,647 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-07-09 17:22:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:10,649 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:22:10,649 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:22:10,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:22:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-07-09 17:22:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-07-09 17:22:10,656 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-07-09 17:22:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:10,656 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-07-09 17:22:10,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-07-09 17:22:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:10,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:10,657 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,880 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-07-09 17:22:10,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961390895] [2021-07-09 17:22:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961390895] [2021-07-09 17:22:10,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961390895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032662809] [2021-07-09 17:22:10,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032662809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:10,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47773324] [2021-07-09 17:22:10,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:10,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:10,983 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,120 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-07-09 17:22:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,122 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:22:11,122 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 17:22:11,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 17:22:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-07-09 17:22:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-07-09 17:22:11,127 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-07-09 17:22:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,127 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-07-09 17:22:11,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-07-09 17:22:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:11,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,128 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:11,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-07-09 17:22:11,349 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-07-09 17:22:11,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:11,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441259781] [2021-07-09 17:22:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441259781] [2021-07-09 17:22:11,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441259781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552511509] [2021-07-09 17:22:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:11,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:11,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552511509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:11,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758856709] [2021-07-09 17:22:11,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:11,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:11,445 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,492 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-07-09 17:22:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,494 INFO L225 Difference]: With dead ends: 391 [2021-07-09 17:22:11,494 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 17:22:11,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 17:22:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-07-09 17:22:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-07-09 17:22:11,498 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-07-09 17:22:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,498 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-07-09 17:22:11,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-07-09 17:22:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:11,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,499 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:11,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-07-09 17:22:11,700 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-07-09 17:22:11,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:11,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440135361] [2021-07-09 17:22:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440135361] [2021-07-09 17:22:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440135361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135227840] [2021-07-09 17:22:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:11,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:11,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135227840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:11,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425716622] [2021-07-09 17:22:11,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:11,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:11,778 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,864 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-07-09 17:22:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:11,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,866 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:22:11,866 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:22:11,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:22:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-07-09 17:22:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-07-09 17:22:11,871 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-07-09 17:22:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,871 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-07-09 17:22:11,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-07-09 17:22:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:11,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,871 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:12,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,072 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-07-09 17:22:12,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:12,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131587737] [2021-07-09 17:22:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:12,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131587737] [2021-07-09 17:22:12,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131587737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81689347] [2021-07-09 17:22:12,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:12,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81689347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236418595] [2021-07-09 17:22:12,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:12,170 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:12,251 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-07-09 17:22:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:12,253 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:22:12,253 INFO L226 Difference]: Without dead ends: 392 [2021-07-09 17:22:12,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-09 17:22:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-07-09 17:22:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-07-09 17:22:12,258 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-07-09 17:22:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:12,258 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-07-09 17:22:12,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-07-09 17:22:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:12,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:12,259 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:12,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-07-09 17:22:12,460 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-07-09 17:22:12,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:12,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689175612] [2021-07-09 17:22:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689175612] [2021-07-09 17:22:12,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689175612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238626058] [2021-07-09 17:22:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:12,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:12,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:12,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238626058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:12,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411871389] [2021-07-09 17:22:12,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:12,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:12,547 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:12,593 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-07-09 17:22:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:12,600 INFO L225 Difference]: With dead ends: 362 [2021-07-09 17:22:12,600 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:22:12,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:22:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-07-09 17:22:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-07-09 17:22:12,605 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-07-09 17:22:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:12,605 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-07-09 17:22:12,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-07-09 17:22:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:12,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:12,606 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:12,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,812 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-07-09 17:22:12,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:12,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742909481] [2021-07-09 17:22:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742909481] [2021-07-09 17:22:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742909481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530716121] [2021-07-09 17:22:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:12,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:12,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530716121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892449734] [2021-07-09 17:22:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:12,928 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:13,030 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-07-09 17:22:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:13,032 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:22:13,032 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:22:13,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:22:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-07-09 17:22:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-07-09 17:22:13,038 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-07-09 17:22:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,038 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-07-09 17:22:13,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-07-09 17:22:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:13,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,039 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,253 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-07-09 17:22:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708825119] [2021-07-09 17:22:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708825119] [2021-07-09 17:22:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708825119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213897458] [2021-07-09 17:22:13,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:13,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:13,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213897458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822700523] [2021-07-09 17:22:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:13,352 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:13,421 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-07-09 17:22:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:13,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:13,423 INFO L225 Difference]: With dead ends: 358 [2021-07-09 17:22:13,423 INFO L226 Difference]: Without dead ends: 358 [2021-07-09 17:22:13,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-09 17:22:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-07-09 17:22:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-07-09 17:22:13,429 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-07-09 17:22:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,429 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-07-09 17:22:13,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-07-09 17:22:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:13,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,429 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,630 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-07-09 17:22:13,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534429420] [2021-07-09 17:22:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534429420] [2021-07-09 17:22:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534429420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326984016] [2021-07-09 17:22:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:13,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326984016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:13,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709012481] [2021-07-09 17:22:13,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:13,725 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:13,827 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-07-09 17:22:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:13,829 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:22:13,829 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:22:13,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:22:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-07-09 17:22:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-07-09 17:22:13,835 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-07-09 17:22:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,835 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-07-09 17:22:13,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-07-09 17:22:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:13,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,836 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,053 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-07-09 17:22:14,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817756754] [2021-07-09 17:22:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817756754] [2021-07-09 17:22:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817756754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950947331] [2021-07-09 17:22:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950947331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:14,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:14,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11215346] [2021-07-09 17:22:14,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:14,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:14,175 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,304 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-07-09 17:22:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:14,305 INFO L225 Difference]: With dead ends: 370 [2021-07-09 17:22:14,306 INFO L226 Difference]: Without dead ends: 370 [2021-07-09 17:22:14,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-09 17:22:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-07-09 17:22:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-07-09 17:22:14,311 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-07-09 17:22:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:14,311 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-07-09 17:22:14,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-07-09 17:22:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:14,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:14,312 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1077,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,517 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-07-09 17:22:14,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094469900] [2021-07-09 17:22:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094469900] [2021-07-09 17:22:14,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094469900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672734406] [2021-07-09 17:22:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672734406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:14,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:14,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177293527] [2021-07-09 17:22:14,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:14,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:14,636 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,698 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-07-09 17:22:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:14,699 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:22:14,699 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 17:22:14,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 17:22:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-07-09 17:22:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-07-09 17:22:14,705 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-07-09 17:22:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:14,705 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-07-09 17:22:14,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-07-09 17:22:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:14,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:14,706 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-07-09 17:22:14,921 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-07-09 17:22:14,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386770201] [2021-07-09 17:22:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386770201] [2021-07-09 17:22:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386770201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209879122] [2021-07-09 17:22:14,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209879122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478168801] [2021-07-09 17:22:15,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:15,038 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,194 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-07-09 17:22:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,195 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:22:15,195 INFO L226 Difference]: Without dead ends: 377 [2021-07-09 17:22:15,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-09 17:22:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-07-09 17:22:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-07-09 17:22:15,200 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-07-09 17:22:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,200 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-07-09 17:22:15,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-07-09 17:22:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:15,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,201 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-09 17:22:15,417 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-07-09 17:22:15,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:15,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384579948] [2021-07-09 17:22:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:15,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384579948] [2021-07-09 17:22:15,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384579948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704168109] [2021-07-09 17:22:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704168109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129197898] [2021-07-09 17:22:15,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:15,518 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,567 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-07-09 17:22:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,568 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:22:15,568 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:22:15,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:22:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-07-09 17:22:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-07-09 17:22:15,574 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-07-09 17:22:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,574 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-07-09 17:22:15,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-07-09 17:22:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:15,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,575 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:15,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-07-09 17:22:15,795 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-07-09 17:22:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:15,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237242503] [2021-07-09 17:22:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:15,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237242503] [2021-07-09 17:22:15,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237242503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109278118] [2021-07-09 17:22:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109278118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909857329] [2021-07-09 17:22:15,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:15,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:15,886 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,989 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-07-09 17:22:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,990 INFO L225 Difference]: With dead ends: 448 [2021-07-09 17:22:15,991 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:22:15,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:22:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-07-09 17:22:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-07-09 17:22:15,995 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-07-09 17:22:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,995 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-07-09 17:22:15,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-07-09 17:22:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:15,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,996 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,197 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-07-09 17:22:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317301406] [2021-07-09 17:22:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317301406] [2021-07-09 17:22:16,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317301406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708455957] [2021-07-09 17:22:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:16,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708455957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:16,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:16,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143033987] [2021-07-09 17:22:16,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:16,281 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,379 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-07-09 17:22:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,380 INFO L225 Difference]: With dead ends: 458 [2021-07-09 17:22:16,380 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:22:16,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:22:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-07-09 17:22:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-07-09 17:22:16,385 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-07-09 17:22:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,385 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-07-09 17:22:16,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-07-09 17:22:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:16,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,386 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,587 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-07-09 17:22:16,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62246333] [2021-07-09 17:22:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62246333] [2021-07-09 17:22:16,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62246333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586341405] [2021-07-09 17:22:16,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586341405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:16,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:16,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778449889] [2021-07-09 17:22:16,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:16,685 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,740 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-07-09 17:22:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,741 INFO L225 Difference]: With dead ends: 433 [2021-07-09 17:22:16,741 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:22:16,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:22:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-07-09 17:22:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-07-09 17:22:16,745 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-07-09 17:22:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-07-09 17:22:16,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-07-09 17:22:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:16,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,746 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-07-09 17:22:16,947 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-07-09 17:22:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878886884] [2021-07-09 17:22:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878886884] [2021-07-09 17:22:16,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878886884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666539219] [2021-07-09 17:22:16,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666539219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:17,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609559813] [2021-07-09 17:22:17,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:17,031 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,123 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-07-09 17:22:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,141 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:22:17,142 INFO L226 Difference]: Without dead ends: 468 [2021-07-09 17:22:17,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-09 17:22:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-07-09 17:22:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-07-09 17:22:17,148 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-07-09 17:22:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,148 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-07-09 17:22:17,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-07-09 17:22:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:17,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,149 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:17,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,372 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-07-09 17:22:17,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:17,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110264073] [2021-07-09 17:22:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110264073] [2021-07-09 17:22:17,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110264073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269469059] [2021-07-09 17:22:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269469059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973019891] [2021-07-09 17:22:17,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:17,484 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,556 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-07-09 17:22:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:17,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,557 INFO L225 Difference]: With dead ends: 407 [2021-07-09 17:22:17,558 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:22:17,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:22:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-07-09 17:22:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-07-09 17:22:17,564 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-07-09 17:22:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,564 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-07-09 17:22:17,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-07-09 17:22:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:17,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,565 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:17,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,792 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-07-09 17:22:17,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:17,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476174658] [2021-07-09 17:22:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476174658] [2021-07-09 17:22:17,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476174658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236132433] [2021-07-09 17:22:17,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:17,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:17,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236132433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:17,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796378652] [2021-07-09 17:22:17,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:17,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:17,876 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,957 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-07-09 17:22:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,958 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:22:17,958 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:22:17,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:22:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-07-09 17:22:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-07-09 17:22:17,963 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-07-09 17:22:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,963 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-07-09 17:22:17,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-07-09 17:22:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:17,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,963 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,164 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-07-09 17:22:18,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821675442] [2021-07-09 17:22:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:18,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821675442] [2021-07-09 17:22:18,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821675442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445766944] [2021-07-09 17:22:18,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:18,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:18,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445766944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:18,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957848593] [2021-07-09 17:22:18,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:18,275 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,396 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-07-09 17:22:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,398 INFO L225 Difference]: With dead ends: 444 [2021-07-09 17:22:18,398 INFO L226 Difference]: Without dead ends: 436 [2021-07-09 17:22:18,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-09 17:22:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-07-09 17:22:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-07-09 17:22:18,403 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-07-09 17:22:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,403 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-07-09 17:22:18,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-07-09 17:22:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:18,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,403 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,604 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-07-09 17:22:18,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729231407] [2021-07-09 17:22:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:18,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729231407] [2021-07-09 17:22:18,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729231407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218734544] [2021-07-09 17:22:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218734544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617122952] [2021-07-09 17:22:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:18,703 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,801 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-07-09 17:22:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,803 INFO L225 Difference]: With dead ends: 419 [2021-07-09 17:22:18,803 INFO L226 Difference]: Without dead ends: 419 [2021-07-09 17:22:18,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-09 17:22:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-07-09 17:22:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-07-09 17:22:18,807 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-07-09 17:22:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,807 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-07-09 17:22:18,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-07-09 17:22:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:18,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,808 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-07-09 17:22:19,009 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-07-09 17:22:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546819689] [2021-07-09 17:22:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546819689] [2021-07-09 17:22:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546819689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459931605] [2021-07-09 17:22:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459931605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498008142] [2021-07-09 17:22:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:19,113 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,167 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-07-09 17:22:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,169 INFO L225 Difference]: With dead ends: 413 [2021-07-09 17:22:19,169 INFO L226 Difference]: Without dead ends: 403 [2021-07-09 17:22:19,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-09 17:22:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-07-09 17:22:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-07-09 17:22:19,175 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-07-09 17:22:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,175 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-07-09 17:22:19,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-07-09 17:22:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:19,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,176 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-07-09 17:22:19,389 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-07-09 17:22:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901851898] [2021-07-09 17:22:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901851898] [2021-07-09 17:22:19,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901851898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635665097] [2021-07-09 17:22:19,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635665097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:19,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926093015] [2021-07-09 17:22:19,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:19,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:19,504 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,626 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-07-09 17:22:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,627 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:22:19,628 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:22:19,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:22:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-07-09 17:22:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-07-09 17:22:19,634 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-07-09 17:22:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,634 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-07-09 17:22:19,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-07-09 17:22:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:19,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,635 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-07-09 17:22:19,858 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-07-09 17:22:19,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995664626] [2021-07-09 17:22:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995664626] [2021-07-09 17:22:19,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995664626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901954928] [2021-07-09 17:22:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901954928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:19,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326349244] [2021-07-09 17:22:19,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:19,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:19,973 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,025 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-07-09 17:22:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,027 INFO L225 Difference]: With dead ends: 411 [2021-07-09 17:22:20,027 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 17:22:20,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 17:22:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-07-09 17:22:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-07-09 17:22:20,033 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-07-09 17:22:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,033 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-07-09 17:22:20,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-07-09 17:22:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:20,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,034 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,257 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-07-09 17:22:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595432541] [2021-07-09 17:22:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595432541] [2021-07-09 17:22:20,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595432541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172457820] [2021-07-09 17:22:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172457820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:20,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:20,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885579185] [2021-07-09 17:22:20,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:20,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:20,364 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,524 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-07-09 17:22:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,526 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:22:20,526 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 17:22:20,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 17:22:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-07-09 17:22:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-07-09 17:22:20,532 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-07-09 17:22:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,533 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-07-09 17:22:20,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-07-09 17:22:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:20,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,533 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,749 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-07-09 17:22:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928442041] [2021-07-09 17:22:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928442041] [2021-07-09 17:22:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928442041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424212344] [2021-07-09 17:22:20,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:20,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:21,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:21,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:21,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:21,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:21,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424212344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:21,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493231863] [2021-07-09 17:22:21,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:21,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:21,494 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:21,826 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-07-09 17:22:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:22:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:21,827 INFO L225 Difference]: With dead ends: 425 [2021-07-09 17:22:21,827 INFO L226 Difference]: Without dead ends: 398 [2021-07-09 17:22:21,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:22:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-07-09 17:22:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-07-09 17:22:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-07-09 17:22:21,834 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-07-09 17:22:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:21,834 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-07-09 17:22:21,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-07-09 17:22:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:21,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:21,835 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:22,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,053 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-07-09 17:22:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:22,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707325745] [2021-07-09 17:22:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707325745] [2021-07-09 17:22:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707325745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543518070] [2021-07-09 17:22:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:22:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:22,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:22,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:22,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:22,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:22,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:22,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543518070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063005157] [2021-07-09 17:22:22,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:22,825 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:23,151 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-07-09 17:22:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:23,152 INFO L225 Difference]: With dead ends: 444 [2021-07-09 17:22:23,153 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:22:23,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:22:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-07-09 17:22:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-07-09 17:22:23,158 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-07-09 17:22:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:23,158 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-07-09 17:22:23,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-07-09 17:22:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:23,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:23,158 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:23,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-07-09 17:22:23,359 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-07-09 17:22:23,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:23,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056365068] [2021-07-09 17:22:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:23,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056365068] [2021-07-09 17:22:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056365068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398319310] [2021-07-09 17:22:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:23,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:24,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:24,217 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:24,218 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:24,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:24,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:24,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:24,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:24,386 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:24,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:24,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398319310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:24,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222085120] [2021-07-09 17:22:24,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:24,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:24,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:24,428 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:24,710 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-07-09 17:22:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:24,712 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:22:24,712 INFO L226 Difference]: Without dead ends: 453 [2021-07-09 17:22:24,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-09 17:22:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-07-09 17:22:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-07-09 17:22:24,717 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-07-09 17:22:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:24,717 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-07-09 17:22:24,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-07-09 17:22:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:24,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:24,718 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,918 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-07-09 17:22:24,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333931932] [2021-07-09 17:22:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:25,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333931932] [2021-07-09 17:22:25,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333931932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688860287] [2021-07-09 17:22:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:25,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:25,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:25,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:25,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:25,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:25,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688860287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:25,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:25,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652117871] [2021-07-09 17:22:25,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:25,539 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:25,825 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-07-09 17:22:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:25,826 INFO L225 Difference]: With dead ends: 479 [2021-07-09 17:22:25,826 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:22:25,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:22:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-07-09 17:22:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-07-09 17:22:25,833 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-07-09 17:22:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:25,833 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-07-09 17:22:25,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-07-09 17:22:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:25,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:25,834 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:26,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,041 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-07-09 17:22:26,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:26,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584292231] [2021-07-09 17:22:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:26,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584292231] [2021-07-09 17:22:26,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584292231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004172699] [2021-07-09 17:22:26,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:26,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:26,742 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:26,743 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:26,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:27,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:27,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:27,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:27,196 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:27,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:27,197 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004172699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:27,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888530052] [2021-07-09 17:22:27,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:27,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:27,261 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:27,769 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-07-09 17:22:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:27,771 INFO L225 Difference]: With dead ends: 513 [2021-07-09 17:22:27,771 INFO L226 Difference]: Without dead ends: 494 [2021-07-09 17:22:27,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:22:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-09 17:22:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-07-09 17:22:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-07-09 17:22:27,777 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-07-09 17:22:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:27,778 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-07-09 17:22:27,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-07-09 17:22:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:27,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:27,779 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:27,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-07-09 17:22:27,993 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-07-09 17:22:27,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:27,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386886089] [2021-07-09 17:22:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386886089] [2021-07-09 17:22:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386886089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89213033] [2021-07-09 17:22:28,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:28,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:28,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:28,729 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:28,729 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:29,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:29,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:29,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:29,207 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:29,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:29,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89213033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:29,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:29,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82359135] [2021-07-09 17:22:29,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:29,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:29,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:29,235 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:29,596 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-07-09 17:22:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:29,598 INFO L225 Difference]: With dead ends: 479 [2021-07-09 17:22:29,598 INFO L226 Difference]: Without dead ends: 469 [2021-07-09 17:22:29,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:22:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-09 17:22:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-07-09 17:22:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-07-09 17:22:29,609 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-07-09 17:22:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:29,609 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-07-09 17:22:29,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-07-09 17:22:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:29,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:29,610 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:29,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:29,811 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-07-09 17:22:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:29,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228579745] [2021-07-09 17:22:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:29,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228579745] [2021-07-09 17:22:29,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228579745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476921268] [2021-07-09 17:22:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:29,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:30,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:30,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:30,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:30,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:30,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476921268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25339348] [2021-07-09 17:22:30,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:30,500 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:30,857 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-07-09 17:22:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:30,859 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:22:30,859 INFO L226 Difference]: Without dead ends: 499 [2021-07-09 17:22:30,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-07-09 17:22:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-07-09 17:22:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-07-09 17:22:30,867 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-07-09 17:22:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,867 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-07-09 17:22:30,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-07-09 17:22:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:30,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,868 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:31,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,070 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:31,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-07-09 17:22:31,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:31,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283196211] [2021-07-09 17:22:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:31,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283196211] [2021-07-09 17:22:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283196211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46143606] [2021-07-09 17:22:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:31,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:31,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:31,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:31,888 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:31,888 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:31,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:32,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:32,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:32,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:32,083 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:32,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:32,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46143606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:32,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:32,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129147868] [2021-07-09 17:22:32,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:32,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:32,114 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:32,677 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-07-09 17:22:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:22:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:32,679 INFO L225 Difference]: With dead ends: 583 [2021-07-09 17:22:32,679 INFO L226 Difference]: Without dead ends: 557 [2021-07-09 17:22:32,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:22:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-07-09 17:22:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-07-09 17:22:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-07-09 17:22:32,688 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-07-09 17:22:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:32,688 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-07-09 17:22:32,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-07-09 17:22:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:32,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:32,689 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:32,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-07-09 17:22:32,913 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-07-09 17:22:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108674047] [2021-07-09 17:22:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:32,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108674047] [2021-07-09 17:22:32,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108674047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405609253] [2021-07-09 17:22:32,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:33,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:33,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:33,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:33,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:33,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:33,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:33,548 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:33,549 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:33,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:33,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:33,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:33,680 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:33,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:33,681 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405609253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:33,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75332755] [2021-07-09 17:22:33,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:33,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:33,708 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:34,115 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-07-09 17:22:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:34,117 INFO L225 Difference]: With dead ends: 516 [2021-07-09 17:22:34,117 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:22:34,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:22:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:22:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-07-09 17:22:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-07-09 17:22:34,123 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-07-09 17:22:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:34,124 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-07-09 17:22:34,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-07-09 17:22:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:34,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:34,124 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:34,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,325 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-07-09 17:22:34,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:34,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308607071] [2021-07-09 17:22:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:34,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308607071] [2021-07-09 17:22:34,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308607071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533883686] [2021-07-09 17:22:34,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:34,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:34,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:34,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:35,154 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:35,154 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:35,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:35,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:35,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:35,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:35,263 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:35,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:35,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533883686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309415420] [2021-07-09 17:22:35,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:35,292 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:35,693 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-07-09 17:22:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:35,695 INFO L225 Difference]: With dead ends: 532 [2021-07-09 17:22:35,695 INFO L226 Difference]: Without dead ends: 522 [2021-07-09 17:22:35,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:22:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-07-09 17:22:35,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-07-09 17:22:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-07-09 17:22:35,701 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-07-09 17:22:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-07-09 17:22:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-07-09 17:22:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:35,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:35,702 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:35,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:35,904 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-07-09 17:22:35,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:35,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819064905] [2021-07-09 17:22:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:35,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819064905] [2021-07-09 17:22:35,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819064905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932298778] [2021-07-09 17:22:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:36,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:36,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:36,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:36,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:36,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:36,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:36,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:36,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:36,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932298778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:36,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:36,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-07-09 17:22:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527547826] [2021-07-09 17:22:36,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:22:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:22:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:36,638 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:36,854 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-07-09 17:22:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:36,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:36,855 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:22:36,855 INFO L226 Difference]: Without dead ends: 467 [2021-07-09 17:22:36,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-07-09 17:22:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-07-09 17:22:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-07-09 17:22:36,871 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-07-09 17:22:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:36,871 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-07-09 17:22:36,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-07-09 17:22:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:36,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:36,872 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:37,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:37,077 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-07-09 17:22:37,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:37,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796428134] [2021-07-09 17:22:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:37,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:37,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796428134] [2021-07-09 17:22:37,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796428134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:37,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272256333] [2021-07-09 17:22:37,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:37,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:37,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:37,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:37,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:37,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:37,770 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:37,771 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:38,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:38,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:38,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:38,297 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:38,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:38,298 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272256333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:38,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:22:38,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577666112] [2021-07-09 17:22:38,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:22:38,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:38,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:22:38,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:38,326 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:38,619 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-07-09 17:22:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:38,622 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:22:38,622 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:22:38,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:22:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:22:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-07-09 17:22:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-07-09 17:22:38,630 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-07-09 17:22:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:38,630 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-07-09 17:22:38,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-07-09 17:22:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:38,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:38,631 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:38,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2246 [2021-07-09 17:22:38,857 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-07-09 17:22:38,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:38,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057176859] [2021-07-09 17:22:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057176859] [2021-07-09 17:22:38,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057176859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173014150] [2021-07-09 17:22:38,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:38,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:39,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:39,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,523 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:39,524 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:39,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:39,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:39,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:39,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,700 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:39,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:39,700 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:39,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173014150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:39,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:39,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:39,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983265138] [2021-07-09 17:22:39,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:39,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:39,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:39,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:39,746 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:40,294 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-07-09 17:22:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:22:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:40,296 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:22:40,296 INFO L226 Difference]: Without dead ends: 566 [2021-07-09 17:22:40,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:22:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-09 17:22:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-07-09 17:22:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-07-09 17:22:40,302 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-07-09 17:22:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:40,302 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-07-09 17:22:40,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-07-09 17:22:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:40,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:40,303 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:40,504 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-07-09 17:22:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:40,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240143517] [2021-07-09 17:22:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:40,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:40,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240143517] [2021-07-09 17:22:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240143517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:40,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551008101] [2021-07-09 17:22:40,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:40,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:40,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:40,942 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:22:40,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 35 treesize of output 252 [2021-07-09 17:22:42,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:42,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:42,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:42,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:42,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:42,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-09 17:22:44,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 17:22:44,245 INFO L628 ElimStorePlain]: treesize reduction 40, result has 27.3 percent of original size [2021-07-09 17:22:44,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:44,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:15 [2021-07-09 17:22:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:44,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551008101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:44,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:44,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:44,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181513244] [2021-07-09 17:22:44,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:44,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:44,273 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:44,608 INFO L93 Difference]: Finished difference Result 521 states and 1560 transitions. [2021-07-09 17:22:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:22:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:44,609 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:22:44,609 INFO L226 Difference]: Without dead ends: 511 [2021-07-09 17:22:44,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-09 17:22:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2021-07-09 17:22:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-07-09 17:22:44,615 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-07-09 17:22:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-07-09 17:22:44,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-07-09 17:22:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:44,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:44,616 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:44,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-07-09 17:22:44,817 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-07-09 17:22:44,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:44,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182458027] [2021-07-09 17:22:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:44,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:44,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182458027] [2021-07-09 17:22:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182458027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:44,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707719963] [2021-07-09 17:22:44,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:44,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:44,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:45,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:45,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:45,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:45,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:45,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707719963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:45,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:45,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:45,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151345283] [2021-07-09 17:22:45,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:45,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:45,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:45,350 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:45,708 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-07-09 17:22:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:45,710 INFO L225 Difference]: With dead ends: 558 [2021-07-09 17:22:45,710 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:22:45,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:22:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-07-09 17:22:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-07-09 17:22:45,717 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-07-09 17:22:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:45,717 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-07-09 17:22:45,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-07-09 17:22:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:45,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:45,718 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:45,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:45,918 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-07-09 17:22:45,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:45,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371625277] [2021-07-09 17:22:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:45,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371625277] [2021-07-09 17:22:45,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371625277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210694388] [2021-07-09 17:22:45,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:46,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:46,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:46,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:46,578 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:46,578 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:46,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:46,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:46,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:46,706 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:46,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:46,707 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:46,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210694388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:46,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:46,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790487030] [2021-07-09 17:22:46,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:46,736 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:47,392 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-07-09 17:22:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:22:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:47,394 INFO L225 Difference]: With dead ends: 647 [2021-07-09 17:22:47,395 INFO L226 Difference]: Without dead ends: 621 [2021-07-09 17:22:47,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:22:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-09 17:22:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-07-09 17:22:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-07-09 17:22:47,404 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-07-09 17:22:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:47,405 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-07-09 17:22:47,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-07-09 17:22:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:47,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:47,406 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:47,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-07-09 17:22:47,621 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-07-09 17:22:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:47,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143335849] [2021-07-09 17:22:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:47,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:47,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143335849] [2021-07-09 17:22:47,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143335849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:47,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049527492] [2021-07-09 17:22:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:47,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:47,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:48,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:48,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:48,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:48,347 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:48,347 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:48,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:48,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:48,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:48,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:48,696 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:48,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:48,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:48,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049527492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:48,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:48,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199995261] [2021-07-09 17:22:48,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:48,724 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:49,466 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-07-09 17:22:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:22:49,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:49,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:49,467 INFO L225 Difference]: With dead ends: 727 [2021-07-09 17:22:49,467 INFO L226 Difference]: Without dead ends: 685 [2021-07-09 17:22:49,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:22:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-09 17:22:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-07-09 17:22:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-07-09 17:22:49,474 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-07-09 17:22:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:49,475 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-07-09 17:22:49,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-07-09 17:22:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:49,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:49,475 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:49,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-07-09 17:22:49,676 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-07-09 17:22:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584262597] [2021-07-09 17:22:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:49,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:49,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584262597] [2021-07-09 17:22:49,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584262597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:49,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178914123] [2021-07-09 17:22:49,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:50,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:50,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:50,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:50,300 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:50,301 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:50,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:50,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:50,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:50,811 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:50,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:50,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:50,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178914123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:50,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:50,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:50,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608733100] [2021-07-09 17:22:50,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:50,841 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:51,325 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-07-09 17:22:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:51,327 INFO L225 Difference]: With dead ends: 598 [2021-07-09 17:22:51,327 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:22:51,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:22:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:22:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-07-09 17:22:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-07-09 17:22:51,333 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-07-09 17:22:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:51,334 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-07-09 17:22:51,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-07-09 17:22:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:51,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:51,334 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:51,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-07-09 17:22:51,535 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-07-09 17:22:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:51,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44168712] [2021-07-09 17:22:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:51,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:51,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44168712] [2021-07-09 17:22:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44168712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:51,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287766175] [2021-07-09 17:22:51,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:51,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:51,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:51,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:52,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:52,197 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:52,197 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:52,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:52,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:52,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:52,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:52,675 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:52,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:52,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:52,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287766175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:52,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:52,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:52,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638213536] [2021-07-09 17:22:52,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:52,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:52,703 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:53,150 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-07-09 17:22:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:53,152 INFO L225 Difference]: With dead ends: 608 [2021-07-09 17:22:53,152 INFO L226 Difference]: Without dead ends: 598 [2021-07-09 17:22:53,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:22:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-09 17:22:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-07-09 17:22:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-07-09 17:22:53,163 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-07-09 17:22:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:53,163 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-07-09 17:22:53,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-07-09 17:22:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:53,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:53,164 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:53,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-07-09 17:22:53,373 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-07-09 17:22:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085486714] [2021-07-09 17:22:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:53,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:53,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085486714] [2021-07-09 17:22:53,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085486714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384251884] [2021-07-09 17:22:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:53,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:53,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:53,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:53,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:53,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:53,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:53,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:53,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384251884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:53,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:22:53,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412793951] [2021-07-09 17:22:53,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:22:53,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:22:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:53,966 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:54,185 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-07-09 17:22:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:54,187 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:22:54,187 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 17:22:54,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 17:22:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-07-09 17:22:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-07-09 17:22:54,193 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-07-09 17:22:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:54,193 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-07-09 17:22:54,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-07-09 17:22:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:54,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:54,194 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:54,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-07-09 17:22:54,406 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-07-09 17:22:54,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:54,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171676018] [2021-07-09 17:22:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:54,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:54,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171676018] [2021-07-09 17:22:54,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171676018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:54,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220783150] [2021-07-09 17:22:54,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:54,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:54,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:54,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:54,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:55,075 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:55,076 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:55,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:55,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:55,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:55,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:55,221 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:55,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:55,222 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220783150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:55,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:55,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:22:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647049893] [2021-07-09 17:22:55,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:55,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:55,247 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:55,756 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-07-09 17:22:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:22:55,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:55,758 INFO L225 Difference]: With dead ends: 618 [2021-07-09 17:22:55,758 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 17:22:55,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:22:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 17:22:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-07-09 17:22:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-07-09 17:22:55,766 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-07-09 17:22:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:55,767 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-07-09 17:22:55,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-07-09 17:22:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:55,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:55,768 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:55,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-07-09 17:22:55,981 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-07-09 17:22:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:55,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726269711] [2021-07-09 17:22:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:56,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726269711] [2021-07-09 17:22:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726269711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240593347] [2021-07-09 17:22:56,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:56,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:56,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:56,718 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:56,719 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:57,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:57,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:57,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:57,186 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:57,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:57,187 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240593347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:57,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:57,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903986346] [2021-07-09 17:22:57,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:57,214 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:57,909 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-07-09 17:22:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:22:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:57,911 INFO L225 Difference]: With dead ends: 681 [2021-07-09 17:22:57,911 INFO L226 Difference]: Without dead ends: 652 [2021-07-09 17:22:57,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:22:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-09 17:22:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-07-09 17:22:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-07-09 17:22:57,918 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-07-09 17:22:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:57,918 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-07-09 17:22:57,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-07-09 17:22:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:57,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:57,919 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:58,120 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-07-09 17:22:58,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:58,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783330112] [2021-07-09 17:22:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783330112] [2021-07-09 17:22:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783330112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452737454] [2021-07-09 17:22:58,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:58,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:58,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:58,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:58,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,753 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:58,753 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:58,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:58,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:58,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:22:58,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,946 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:58,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:58,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:22:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452737454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:58,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:22:58,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697140333] [2021-07-09 17:22:58,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:58,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:58,974 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:59,466 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-07-09 17:22:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:59,468 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:22:59,468 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:22:59,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:22:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:22:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-07-09 17:22:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-07-09 17:22:59,474 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-07-09 17:22:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:59,474 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-07-09 17:22:59,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-07-09 17:22:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:59,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:59,475 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:59,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:59,676 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-07-09 17:22:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:59,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182588082] [2021-07-09 17:22:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:59,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:59,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182588082] [2021-07-09 17:22:59,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182588082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749923907] [2021-07-09 17:22:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:59,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:22:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:00,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:00,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:00,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:00,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:00,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749923907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:00,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:00,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647654808] [2021-07-09 17:23:00,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:00,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:00,300 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:00,566 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-07-09 17:23:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:00,568 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:23:00,568 INFO L226 Difference]: Without dead ends: 597 [2021-07-09 17:23:00,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-09 17:23:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-07-09 17:23:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-07-09 17:23:00,575 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-07-09 17:23:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:00,575 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-07-09 17:23:00,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-07-09 17:23:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:00,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:00,576 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:00,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4029 [2021-07-09 17:23:00,777 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:00,777 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-07-09 17:23:00,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:00,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497304309] [2021-07-09 17:23:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:00,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497304309] [2021-07-09 17:23:00,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497304309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044899543] [2021-07-09 17:23:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:00,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:01,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:01,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:01,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:01,499 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:01,499 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:01,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:01,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:01,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:01,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:01,831 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:01,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:01,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:01,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044899543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:01,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66008007] [2021-07-09 17:23:01,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:01,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:01,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:01,863 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:02,591 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-07-09 17:23:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:23:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:02,593 INFO L225 Difference]: With dead ends: 700 [2021-07-09 17:23:02,593 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:23:02,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:23:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-07-09 17:23:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-07-09 17:23:02,600 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-07-09 17:23:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:02,601 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-07-09 17:23:02,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-07-09 17:23:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:02,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:02,602 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:02,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,802 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:02,802 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-07-09 17:23:02,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:02,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662320093] [2021-07-09 17:23:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:02,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662320093] [2021-07-09 17:23:02,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662320093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062297496] [2021-07-09 17:23:02,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:03,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:03,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:03,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:03,458 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:03,458 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:03,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:03,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:03,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:03,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:03,749 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:03,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:03,750 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062297496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:03,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:03,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66133268] [2021-07-09 17:23:03,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:03,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:03,777 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:04,272 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-07-09 17:23:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:04,274 INFO L225 Difference]: With dead ends: 692 [2021-07-09 17:23:04,274 INFO L226 Difference]: Without dead ends: 682 [2021-07-09 17:23:04,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:23:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-09 17:23:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-07-09 17:23:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-07-09 17:23:04,282 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-07-09 17:23:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:04,282 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-07-09 17:23:04,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-07-09 17:23:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:04,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:04,283 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:04,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:04,483 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-07-09 17:23:04,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:04,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003932160] [2021-07-09 17:23:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:04,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003932160] [2021-07-09 17:23:04,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003932160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712304669] [2021-07-09 17:23:04,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:04,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:23:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:04,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:04,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:05,142 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:05,143 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:05,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:05,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:05,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:05,291 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:05,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:05,292 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:05,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712304669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:05,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:05,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:05,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804901798] [2021-07-09 17:23:05,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:05,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:05,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:05,320 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:05,964 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-07-09 17:23:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:23:05,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:05,968 INFO L225 Difference]: With dead ends: 752 [2021-07-09 17:23:05,968 INFO L226 Difference]: Without dead ends: 730 [2021-07-09 17:23:05,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:23:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-07-09 17:23:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-07-09 17:23:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-07-09 17:23:05,976 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-07-09 17:23:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:05,976 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-07-09 17:23:05,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-07-09 17:23:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:05,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:05,977 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:06,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4371,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:06,177 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-07-09 17:23:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:06,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782993735] [2021-07-09 17:23:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:06,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:06,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782993735] [2021-07-09 17:23:06,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782993735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:06,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358515333] [2021-07-09 17:23:06,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:06,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:06,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:06,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:06,857 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:06,857 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:06,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:07,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:07,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:07,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:07,052 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:07,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:07,053 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:07,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358515333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:07,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:07,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:07,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188672639] [2021-07-09 17:23:07,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:07,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:07,079 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:07,603 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-07-09 17:23:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:23:07,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:07,605 INFO L225 Difference]: With dead ends: 683 [2021-07-09 17:23:07,605 INFO L226 Difference]: Without dead ends: 678 [2021-07-09 17:23:07,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:23:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-09 17:23:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-07-09 17:23:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-07-09 17:23:07,613 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-07-09 17:23:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:07,613 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-07-09 17:23:07,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-07-09 17:23:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:07,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:07,616 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:07,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:07,840 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-07-09 17:23:07,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:07,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511620274] [2021-07-09 17:23:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:07,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:07,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511620274] [2021-07-09 17:23:07,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511620274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:07,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209976102] [2021-07-09 17:23:07,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:08,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:08,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:08,524 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:08,525 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:08,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:08,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:08,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:08,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:08,639 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:08,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:08,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:08,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209976102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:08,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:08,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:08,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250130807] [2021-07-09 17:23:08,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:08,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:08,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:08,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:08,667 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:09,117 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-07-09 17:23:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:09,119 INFO L225 Difference]: With dead ends: 681 [2021-07-09 17:23:09,119 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:23:09,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:23:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:23:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-07-09 17:23:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-07-09 17:23:09,127 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-07-09 17:23:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:09,127 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-07-09 17:23:09,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-07-09 17:23:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:09,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:09,128 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:09,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4596 [2021-07-09 17:23:09,333 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-07-09 17:23:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520577706] [2021-07-09 17:23:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:09,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520577706] [2021-07-09 17:23:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520577706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705384558] [2021-07-09 17:23:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:09,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:09,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:09,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:09,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:09,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:09,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705384558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:09,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:09,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964134984] [2021-07-09 17:23:09,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:09,905 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:10,173 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-07-09 17:23:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:10,175 INFO L225 Difference]: With dead ends: 630 [2021-07-09 17:23:10,175 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:23:10,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:23:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-07-09 17:23:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-07-09 17:23:10,183 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-07-09 17:23:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:10,183 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-07-09 17:23:10,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-07-09 17:23:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:10,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:10,184 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:10,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-07-09 17:23:10,388 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-07-09 17:23:10,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:10,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281877600] [2021-07-09 17:23:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:10,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281877600] [2021-07-09 17:23:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281877600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726397717] [2021-07-09 17:23:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:10,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:10,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:10,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:10,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:11,153 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:11,153 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:11,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:11,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:11,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:11,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:11,366 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:11,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:11,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:11,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726397717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:11,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:11,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:11,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407206050] [2021-07-09 17:23:11,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:11,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:11,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:11,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:11,394 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:12,062 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-07-09 17:23:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:12,063 INFO L225 Difference]: With dead ends: 747 [2021-07-09 17:23:12,063 INFO L226 Difference]: Without dead ends: 737 [2021-07-09 17:23:12,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-07-09 17:23:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-07-09 17:23:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-07-09 17:23:12,071 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-07-09 17:23:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:12,071 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-07-09 17:23:12,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-07-09 17:23:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:12,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:12,072 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:12,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:12,273 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-07-09 17:23:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:12,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340581145] [2021-07-09 17:23:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:12,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:12,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340581145] [2021-07-09 17:23:12,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340581145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:12,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449071104] [2021-07-09 17:23:12,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:12,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:12,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:12,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:12,984 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:12,984 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:12,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:13,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:13,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:13,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:13,108 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:13,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:13,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:13,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449071104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:13,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:13,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:13,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456669918] [2021-07-09 17:23:13,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:13,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:13,136 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:13,848 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-07-09 17:23:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:23:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:13,850 INFO L225 Difference]: With dead ends: 777 [2021-07-09 17:23:13,850 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:23:13,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:23:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:23:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-07-09 17:23:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-07-09 17:23:13,858 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-07-09 17:23:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:13,858 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-07-09 17:23:13,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-07-09 17:23:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:13,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:13,859 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:14,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,059 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:14,060 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-07-09 17:23:14,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:14,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114786362] [2021-07-09 17:23:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:14,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:14,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114786362] [2021-07-09 17:23:14,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114786362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54297218] [2021-07-09 17:23:14,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:14,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:14,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:14,693 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:14,693 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:14,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:14,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:14,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:14,933 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:14,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:14,934 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:14,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54297218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:14,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:14,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133473763] [2021-07-09 17:23:14,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:14,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:14,961 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:15,516 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-07-09 17:23:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:15,522 INFO L225 Difference]: With dead ends: 676 [2021-07-09 17:23:15,522 INFO L226 Difference]: Without dead ends: 671 [2021-07-09 17:23:15,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:23:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-09 17:23:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-07-09 17:23:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-07-09 17:23:15,529 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-07-09 17:23:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:15,529 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-07-09 17:23:15,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-07-09 17:23:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:15,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:15,530 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:15,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:15,731 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-07-09 17:23:15,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:15,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979306464] [2021-07-09 17:23:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:15,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:15,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979306464] [2021-07-09 17:23:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979306464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162962173] [2021-07-09 17:23:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:16,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:16,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:16,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:16,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:16,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:16,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162962173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:16,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:16,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795060563] [2021-07-09 17:23:16,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:16,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:16,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:16,222 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:16,594 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-07-09 17:23:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:16,595 INFO L225 Difference]: With dead ends: 707 [2021-07-09 17:23:16,595 INFO L226 Difference]: Without dead ends: 691 [2021-07-09 17:23:16,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-07-09 17:23:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-07-09 17:23:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-07-09 17:23:16,603 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-07-09 17:23:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:16,603 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-07-09 17:23:16,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-07-09 17:23:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:16,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:16,604 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:16,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:16,805 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-07-09 17:23:16,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:16,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083089273] [2021-07-09 17:23:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:16,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:16,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083089273] [2021-07-09 17:23:16,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083089273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727351648] [2021-07-09 17:23:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:16,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:17,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:17,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:17,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:17,592 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:17,593 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:17,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:17,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:17,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:17,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:17,835 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:17,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:17,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:17,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727351648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:17,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:17,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572837525] [2021-07-09 17:23:17,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:17,864 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:18,651 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-07-09 17:23:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:23:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:18,653 INFO L225 Difference]: With dead ends: 772 [2021-07-09 17:23:18,653 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 17:23:18,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:23:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 17:23:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-07-09 17:23:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-07-09 17:23:18,662 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-07-09 17:23:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:18,662 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-07-09 17:23:18,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-07-09 17:23:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:18,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:18,663 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:18,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5168 [2021-07-09 17:23:18,863 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-07-09 17:23:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:18,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083840283] [2021-07-09 17:23:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:18,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083840283] [2021-07-09 17:23:18,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083840283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353868481] [2021-07-09 17:23:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:23:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:19,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:19,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:19,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:19,612 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:19,613 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:19,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:19,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:19,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:19,873 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:19,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:19,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353868481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:19,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:19,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415849514] [2021-07-09 17:23:19,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:19,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:19,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:19,901 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,497 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-07-09 17:23:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,499 INFO L225 Difference]: With dead ends: 788 [2021-07-09 17:23:20,499 INFO L226 Difference]: Without dead ends: 778 [2021-07-09 17:23:20,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:23:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-07-09 17:23:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-07-09 17:23:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-07-09 17:23:20,508 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-07-09 17:23:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,508 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-07-09 17:23:20,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-07-09 17:23:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:20,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,509 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5316 [2021-07-09 17:23:20,710 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-07-09 17:23:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918036412] [2021-07-09 17:23:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:20,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918036412] [2021-07-09 17:23:20,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918036412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562200542] [2021-07-09 17:23:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:20,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:20,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:20,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:21,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:21,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:21,369 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:21,369 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:21,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:21,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:21,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:21,516 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:21,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:21,516 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562200542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425571745] [2021-07-09 17:23:21,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:21,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:21,544 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,110 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-07-09 17:23:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,112 INFO L225 Difference]: With dead ends: 836 [2021-07-09 17:23:22,112 INFO L226 Difference]: Without dead ends: 826 [2021-07-09 17:23:22,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:23:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-09 17:23:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-07-09 17:23:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-07-09 17:23:22,120 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-07-09 17:23:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,120 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-07-09 17:23:22,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-07-09 17:23:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:22,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,121 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:22,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,322 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-07-09 17:23:22,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:22,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980692825] [2021-07-09 17:23:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980692825] [2021-07-09 17:23:22,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980692825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792077947] [2021-07-09 17:23:22,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:22,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:22,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:22,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:22,958 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:22,959 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:23,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:23,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:23,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:23,293 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:23,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:23,294 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792077947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:23,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:23,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788180760] [2021-07-09 17:23:23,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:23,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:23,321 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:24,053 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-07-09 17:23:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:23:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:24,055 INFO L225 Difference]: With dead ends: 890 [2021-07-09 17:23:24,055 INFO L226 Difference]: Without dead ends: 868 [2021-07-09 17:23:24,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:23:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-09 17:23:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-07-09 17:23:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-07-09 17:23:24,065 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-07-09 17:23:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:24,065 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-07-09 17:23:24,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-07-09 17:23:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:24,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:24,066 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:24,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5511,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:24,266 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-07-09 17:23:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:24,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595314485] [2021-07-09 17:23:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:24,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:24,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595314485] [2021-07-09 17:23:24,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595314485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:24,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574217383] [2021-07-09 17:23:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:24,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:24,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:24,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:24,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:24,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:24,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:25,153 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:25,154 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:25,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:25,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:25,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:25,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:25,281 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:25,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:25,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574217383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:25,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:25,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521245266] [2021-07-09 17:23:25,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:25,310 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:25,860 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-07-09 17:23:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:25,861 INFO L225 Difference]: With dead ends: 803 [2021-07-09 17:23:25,861 INFO L226 Difference]: Without dead ends: 798 [2021-07-09 17:23:25,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:23:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-07-09 17:23:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-07-09 17:23:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-07-09 17:23:25,870 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-07-09 17:23:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:25,870 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-07-09 17:23:25,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-07-09 17:23:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:25,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:25,871 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:26,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5650 [2021-07-09 17:23:26,072 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:26,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-07-09 17:23:26,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:26,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359921107] [2021-07-09 17:23:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:26,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359921107] [2021-07-09 17:23:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359921107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817856111] [2021-07-09 17:23:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:26,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:26,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:26,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:26,908 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:26,908 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:26,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:27,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:27,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:27,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:27,061 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:27,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:27,062 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817856111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562877146] [2021-07-09 17:23:27,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:27,089 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,637 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-07-09 17:23:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,638 INFO L225 Difference]: With dead ends: 813 [2021-07-09 17:23:27,638 INFO L226 Difference]: Without dead ends: 808 [2021-07-09 17:23:27,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:23:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-07-09 17:23:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-07-09 17:23:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-07-09 17:23:27,646 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-07-09 17:23:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,646 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-07-09 17:23:27,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-07-09 17:23:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:27,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,647 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5778,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,850 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-07-09 17:23:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348293791] [2021-07-09 17:23:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348293791] [2021-07-09 17:23:27,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348293791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521638910] [2021-07-09 17:23:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:27,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:28,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:28,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:28,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:28,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:28,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:28,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521638910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:28,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:28,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974211902] [2021-07-09 17:23:28,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:28,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:28,394 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:28,735 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-07-09 17:23:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:28,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:28,736 INFO L225 Difference]: With dead ends: 751 [2021-07-09 17:23:28,736 INFO L226 Difference]: Without dead ends: 733 [2021-07-09 17:23:28,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-07-09 17:23:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-07-09 17:23:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-07-09 17:23:28,745 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-07-09 17:23:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:28,745 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-07-09 17:23:28,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-07-09 17:23:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:28,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:28,746 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:28,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-07-09 17:23:28,946 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-07-09 17:23:28,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:28,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611444707] [2021-07-09 17:23:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:29,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611444707] [2021-07-09 17:23:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611444707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991895993] [2021-07-09 17:23:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:29,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:29,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:29,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:29,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:29,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:29,594 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:29,594 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:29,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:29,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:30,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:30,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:30,016 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:30,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:30,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991895993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:30,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:30,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883987249] [2021-07-09 17:23:30,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:30,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:30,044 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:30,776 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-07-09 17:23:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:30,778 INFO L225 Difference]: With dead ends: 846 [2021-07-09 17:23:30,778 INFO L226 Difference]: Without dead ends: 836 [2021-07-09 17:23:30,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 742.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:23:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-07-09 17:23:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-07-09 17:23:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-07-09 17:23:30,787 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-07-09 17:23:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:30,787 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-07-09 17:23:30,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-07-09 17:23:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:30,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:30,788 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:30,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,989 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-07-09 17:23:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407614807] [2021-07-09 17:23:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407614807] [2021-07-09 17:23:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407614807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749595746] [2021-07-09 17:23:31,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:31,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:31,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:31,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:31,749 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:31,750 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:31,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:31,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:31,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:31,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:31,968 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:31,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:31,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749595746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:31,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604006168] [2021-07-09 17:23:31,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:31,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:31,996 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:32,799 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-07-09 17:23:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:32,801 INFO L225 Difference]: With dead ends: 871 [2021-07-09 17:23:32,801 INFO L226 Difference]: Without dead ends: 856 [2021-07-09 17:23:32,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:23:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-07-09 17:23:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-07-09 17:23:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-07-09 17:23:32,809 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-07-09 17:23:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:32,810 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-07-09 17:23:32,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-07-09 17:23:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:32,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:32,810 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:33,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:33,011 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-07-09 17:23:33,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:33,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581263892] [2021-07-09 17:23:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581263892] [2021-07-09 17:23:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581263892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621166799] [2021-07-09 17:23:33,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:33,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:33,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:33,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:33,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:33,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:33,659 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:33,660 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:33,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:33,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:33,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:33,888 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:33,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:33,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621166799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953321272] [2021-07-09 17:23:33,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:33,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:33,916 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,524 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-07-09 17:23:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:34,526 INFO L225 Difference]: With dead ends: 805 [2021-07-09 17:23:34,526 INFO L226 Difference]: Without dead ends: 800 [2021-07-09 17:23:34,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 638.4ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:23:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-07-09 17:23:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-07-09 17:23:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-07-09 17:23:34,534 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-07-09 17:23:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:34,534 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-07-09 17:23:34,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-07-09 17:23:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:34,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:34,535 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-07-09 17:23:34,736 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-07-09 17:23:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042540246] [2021-07-09 17:23:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042540246] [2021-07-09 17:23:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042540246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868247361] [2021-07-09 17:23:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:23:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:35,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:35,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:35,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:35,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:35,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868247361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:35,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:35,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011529107] [2021-07-09 17:23:35,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:35,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:35,231 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:35,556 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-07-09 17:23:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:35,557 INFO L225 Difference]: With dead ends: 817 [2021-07-09 17:23:35,557 INFO L226 Difference]: Without dead ends: 803 [2021-07-09 17:23:35,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-07-09 17:23:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-07-09 17:23:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-07-09 17:23:35,567 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-07-09 17:23:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:35,567 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-07-09 17:23:35,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-07-09 17:23:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:35,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:35,568 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:35,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6402,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:35,769 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-07-09 17:23:35,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:35,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578333328] [2021-07-09 17:23:35,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578333328] [2021-07-09 17:23:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578333328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413582144] [2021-07-09 17:23:35,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:36,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:36,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:36,604 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:36,605 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:36,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:36,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:36,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:36,795 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:36,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:36,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:36,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413582144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:36,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:36,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:36,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294104313] [2021-07-09 17:23:36,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:36,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:36,824 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:37,714 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-07-09 17:23:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:23:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:37,716 INFO L225 Difference]: With dead ends: 881 [2021-07-09 17:23:37,716 INFO L226 Difference]: Without dead ends: 871 [2021-07-09 17:23:37,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-07-09 17:23:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-07-09 17:23:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-07-09 17:23:37,726 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-07-09 17:23:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:37,726 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-07-09 17:23:37,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-07-09 17:23:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:37,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:37,727 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6446,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:37,927 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-07-09 17:23:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513233368] [2021-07-09 17:23:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513233368] [2021-07-09 17:23:38,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513233368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410830630] [2021-07-09 17:23:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:38,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:38,680 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:38,681 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:38,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:38,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:38,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:38,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:38,978 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:38,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:38,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410830630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:39,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:39,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116427430] [2021-07-09 17:23:39,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:39,008 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,744 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-07-09 17:23:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:23:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:39,746 INFO L225 Difference]: With dead ends: 914 [2021-07-09 17:23:39,746 INFO L226 Difference]: Without dead ends: 904 [2021-07-09 17:23:39,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-09 17:23:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-07-09 17:23:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-07-09 17:23:39,756 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-07-09 17:23:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:39,756 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-07-09 17:23:39,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-07-09 17:23:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:39,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:39,758 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:39,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6564 [2021-07-09 17:23:39,959 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-07-09 17:23:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:39,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852994387] [2021-07-09 17:23:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852994387] [2021-07-09 17:23:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852994387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503277819] [2021-07-09 17:23:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:40,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:40,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:40,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:40,645 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:40,645 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:40,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:40,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:40,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:40,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:40,789 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:40,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:40,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503277819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:40,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:40,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973371250] [2021-07-09 17:23:40,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:40,816 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:41,598 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-07-09 17:23:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:23:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:41,600 INFO L225 Difference]: With dead ends: 960 [2021-07-09 17:23:41,600 INFO L226 Difference]: Without dead ends: 950 [2021-07-09 17:23:41,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 568.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-07-09 17:23:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-07-09 17:23:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-07-09 17:23:41,611 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-07-09 17:23:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:41,611 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-07-09 17:23:41,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-07-09 17:23:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:41,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:41,613 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:41,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:41,813 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-07-09 17:23:41,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:41,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386636452] [2021-07-09 17:23:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:41,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386636452] [2021-07-09 17:23:41,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386636452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256804024] [2021-07-09 17:23:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:41,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:42,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:42,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:42,458 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:42,459 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:42,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:42,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:42,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:42,786 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:42,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:42,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256804024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:42,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 17:23:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480285463] [2021-07-09 17:23:42,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:23:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:23:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:42,813 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:43,441 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-07-09 17:23:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:23:43,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:43,443 INFO L225 Difference]: With dead ends: 966 [2021-07-09 17:23:43,443 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 17:23:43,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 17:23:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-07-09 17:23:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-07-09 17:23:43,453 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-07-09 17:23:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:43,453 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-07-09 17:23:43,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-07-09 17:23:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:43,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:43,454 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:43,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:43,655 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-07-09 17:23:43,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:43,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828723081] [2021-07-09 17:23:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:43,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828723081] [2021-07-09 17:23:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828723081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795973867] [2021-07-09 17:23:43,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:43,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:44,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:44,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:44,341 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:44,342 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:44,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:44,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:44,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:44,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:44,488 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:44,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:44,489 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795973867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:44,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:44,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117734810] [2021-07-09 17:23:44,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:44,517 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,293 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-07-09 17:23:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:23:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,295 INFO L225 Difference]: With dead ends: 1010 [2021-07-09 17:23:45,295 INFO L226 Difference]: Without dead ends: 995 [2021-07-09 17:23:45,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:23:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-09 17:23:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-07-09 17:23:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-07-09 17:23:45,308 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-07-09 17:23:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,308 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-07-09 17:23:45,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-07-09 17:23:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:45,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,310 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6954 [2021-07-09 17:23:45,532 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-07-09 17:23:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39641969] [2021-07-09 17:23:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39641969] [2021-07-09 17:23:45,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39641969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148727606] [2021-07-09 17:23:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:45,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:45,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:46,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:46,362 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:46,363 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:46,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:46,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:46,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:46,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:46,532 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:46,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:46,533 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148727606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:46,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980271014] [2021-07-09 17:23:46,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:46,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:46,561 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:47,180 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-07-09 17:23:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:47,182 INFO L225 Difference]: With dead ends: 964 [2021-07-09 17:23:47,183 INFO L226 Difference]: Without dead ends: 959 [2021-07-09 17:23:47,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:23:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-07-09 17:23:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-07-09 17:23:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-07-09 17:23:47,193 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-07-09 17:23:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:47,193 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-07-09 17:23:47,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-07-09 17:23:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:23:47,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:47,194 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:47,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,395 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-07-09 17:23:47,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:47,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677924548] [2021-07-09 17:23:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:47,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:47,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677924548] [2021-07-09 17:23:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677924548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:47,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342842460] [2021-07-09 17:23:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:23:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:47,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:47,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:48,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:48,235 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:48,235 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:48,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:48,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:48,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:23:48,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:48,545 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:48,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:48,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-07-09 17:23:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342842460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:23:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077038006] [2021-07-09 17:23:48,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:48,574 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:49,217 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-07-09 17:23:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:23:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:49,219 INFO L225 Difference]: With dead ends: 980 [2021-07-09 17:23:49,219 INFO L226 Difference]: Without dead ends: 975 [2021-07-09 17:23:49,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:23:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-07-09 17:23:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-07-09 17:23:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-07-09 17:23:49,231 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-07-09 17:23:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:49,231 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-07-09 17:23:49,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-07-09 17:23:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:49,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:49,232 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7192,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:49,433 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-07-09 17:23:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833567230] [2021-07-09 17:23:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:49,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833567230] [2021-07-09 17:23:49,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833567230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743853456] [2021-07-09 17:23:49,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:49,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:49,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:23:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:49,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:50,464 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2021-07-09 17:23:51,337 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 264 [2021-07-09 17:23:51,448 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 274 [2021-07-09 17:23:51,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:51,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:51,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:51,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743853456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:51,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:51,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000307352] [2021-07-09 17:23:51,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:51,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:51,676 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:52,002 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-07-09 17:23:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:23:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:23:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:52,004 INFO L225 Difference]: With dead ends: 905 [2021-07-09 17:23:52,004 INFO L226 Difference]: Without dead ends: 883 [2021-07-09 17:23:52,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-07-09 17:23:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-07-09 17:23:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-07-09 17:23:52,014 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-07-09 17:23:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:52,014 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-07-09 17:23:52,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-07-09 17:23:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:52,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:52,015 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:52,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:52,216 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-07-09 17:23:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:52,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983618955] [2021-07-09 17:23:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:52,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:52,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983618955] [2021-07-09 17:23:52,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983618955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140261281] [2021-07-09 17:23:52,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:52,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:23:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:52,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:23:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:52,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:53,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:53,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140261281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:53,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912955862] [2021-07-09 17:23:53,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:53,167 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:53,602 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-07-09 17:23:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:23:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:23:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:53,604 INFO L225 Difference]: With dead ends: 899 [2021-07-09 17:23:53,604 INFO L226 Difference]: Without dead ends: 880 [2021-07-09 17:23:53,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:23:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-07-09 17:23:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-07-09 17:23:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-07-09 17:23:53,616 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-07-09 17:23:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:53,616 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-07-09 17:23:53,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-07-09 17:23:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:53,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:53,617 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:53,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7594,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,818 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-07-09 17:23:53,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:53,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120410168] [2021-07-09 17:23:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120410168] [2021-07-09 17:23:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120410168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405176353] [2021-07-09 17:23:53,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:53,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:23:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:54,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:54,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:23:55,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:55,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:55,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:55,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:23:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:55,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405176353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:55,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:55,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900016524] [2021-07-09 17:23:55,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:55,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:55,090 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:55,483 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-07-09 17:23:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:23:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:23:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:55,485 INFO L225 Difference]: With dead ends: 889 [2021-07-09 17:23:55,485 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 17:23:55,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:23:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 17:23:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-07-09 17:23:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-07-09 17:23:55,495 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-07-09 17:23:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:55,495 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-07-09 17:23:55,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-07-09 17:23:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:55,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:55,496 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:55,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-07-09 17:23:55,697 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-07-09 17:23:55,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:55,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036486642] [2021-07-09 17:23:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:55,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036486642] [2021-07-09 17:23:55,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036486642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050283666] [2021-07-09 17:23:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:55,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:55,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:23:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:56,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:56,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:23:57,679 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 210 [2021-07-09 17:23:58,608 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 258 [2021-07-09 17:23:58,748 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 277 [2021-07-09 17:23:58,925 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 302 [2021-07-09 17:23:59,295 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-07-09 17:23:59,776 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-07-09 17:24:00,314 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-07-09 17:24:00,855 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 526 [2021-07-09 17:24:01,067 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 236 [2021-07-09 17:24:02,228 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-07-09 17:24:02,343 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-07-09 17:24:02,475 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 214 [2021-07-09 17:24:02,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:02,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:02,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:03,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:03,070 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:03,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:03,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050283666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:03,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:24:03,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595249609] [2021-07-09 17:24:03,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:03,107 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:03,571 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-07-09 17:24:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:03,574 INFO L225 Difference]: With dead ends: 922 [2021-07-09 17:24:03,574 INFO L226 Difference]: Without dead ends: 910 [2021-07-09 17:24:03,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-07-09 17:24:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-07-09 17:24:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-07-09 17:24:03,584 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-07-09 17:24:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:03,584 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-07-09 17:24:03,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-07-09 17:24:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:03,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:03,585 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:03,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7885 [2021-07-09 17:24:03,786 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-07-09 17:24:03,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:03,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929456077] [2021-07-09 17:24:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929456077] [2021-07-09 17:24:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929456077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730917528] [2021-07-09 17:24:03,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:03,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:03,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:04,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:04,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:05,395 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-07-09 17:24:05,620 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-07-09 17:24:05,855 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 435 [2021-07-09 17:24:06,678 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 488 [2021-07-09 17:24:06,882 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 323 [2021-07-09 17:24:08,399 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 330 [2021-07-09 17:24:08,513 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 283 [2021-07-09 17:24:09,773 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 479 [2021-07-09 17:24:10,270 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-07-09 17:24:10,778 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-07-09 17:24:11,315 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 634 [2021-07-09 17:24:11,756 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 534 [2021-07-09 17:24:12,258 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 234 [2021-07-09 17:24:12,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:12,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:12,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:13,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:13,385 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:13,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:13,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730917528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:13,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:13,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120582016] [2021-07-09 17:24:13,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:13,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:13,418 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,890 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-07-09 17:24:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,891 INFO L225 Difference]: With dead ends: 960 [2021-07-09 17:24:13,891 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 17:24:13,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 17:24:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-07-09 17:24:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-07-09 17:24:13,901 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-07-09 17:24:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,902 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-07-09 17:24:13,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-07-09 17:24:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:13,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,903 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:14,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-07-09 17:24:14,103 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-07-09 17:24:14,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:14,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648512914] [2021-07-09 17:24:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:14,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648512914] [2021-07-09 17:24:14,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648512914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890939270] [2021-07-09 17:24:14,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890939270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:14,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:14,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708237089] [2021-07-09 17:24:14,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:14,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:14,214 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:14,278 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-07-09 17:24:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:14,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:14,280 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 17:24:14,280 INFO L226 Difference]: Without dead ends: 1106 [2021-07-09 17:24:14,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-09 17:24:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-07-09 17:24:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-07-09 17:24:14,292 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-07-09 17:24:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:14,292 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-07-09 17:24:14,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-07-09 17:24:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:14,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:14,293 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:14,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9440,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:14,512 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-07-09 17:24:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975194064] [2021-07-09 17:24:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:14,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:14,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975194064] [2021-07-09 17:24:14,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975194064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517985745] [2021-07-09 17:24:14,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:14,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:14,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:14,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:14,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:15,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:15,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:15,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:15,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:15,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517985745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:15,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:15,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:15,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102858880] [2021-07-09 17:24:15,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:15,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:15,388 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:15,758 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-07-09 17:24:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:15,760 INFO L225 Difference]: With dead ends: 911 [2021-07-09 17:24:15,760 INFO L226 Difference]: Without dead ends: 900 [2021-07-09 17:24:15,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-07-09 17:24:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-07-09 17:24:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-07-09 17:24:15,776 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-07-09 17:24:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:15,776 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-07-09 17:24:15,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-07-09 17:24:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:15,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:15,778 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:16,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9441 [2021-07-09 17:24:16,001 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-07-09 17:24:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377092280] [2021-07-09 17:24:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:16,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:16,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377092280] [2021-07-09 17:24:16,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377092280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169236564] [2021-07-09 17:24:16,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:16,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:16,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:16,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:16,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:17,679 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 248 [2021-07-09 17:24:17,836 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 334 [2021-07-09 17:24:19,017 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 443 [2021-07-09 17:24:19,360 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-07-09 17:24:19,690 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-07-09 17:24:20,074 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 470 [2021-07-09 17:24:20,514 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 525 [2021-07-09 17:24:20,836 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 504 [2021-07-09 17:24:21,446 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 288 [2021-07-09 17:24:21,640 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-07-09 17:24:21,819 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-07-09 17:24:21,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 223 [2021-07-09 17:24:22,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:22,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:22,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:22,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:22,526 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:22,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:22,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169236564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750981407] [2021-07-09 17:24:22,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:22,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:22,558 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:22,960 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-07-09 17:24:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:22,962 INFO L225 Difference]: With dead ends: 946 [2021-07-09 17:24:22,962 INFO L226 Difference]: Without dead ends: 936 [2021-07-09 17:24:22,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-09 17:24:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-07-09 17:24:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-07-09 17:24:22,973 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-07-09 17:24:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-07-09 17:24:22,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-07-09 17:24:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:22,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:22,974 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:23,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9533 [2021-07-09 17:24:23,175 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-07-09 17:24:23,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:23,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394743627] [2021-07-09 17:24:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:23,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394743627] [2021-07-09 17:24:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394743627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959087794] [2021-07-09 17:24:23,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:23,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:23,705 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:24:23,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:25,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:25,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:26,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:26,441 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:26,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:26,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959087794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770319746] [2021-07-09 17:24:26,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:26,497 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,131 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-07-09 17:24:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,133 INFO L225 Difference]: With dead ends: 1017 [2021-07-09 17:24:27,133 INFO L226 Difference]: Without dead ends: 1005 [2021-07-09 17:24:27,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-09 17:24:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-07-09 17:24:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-07-09 17:24:27,144 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-07-09 17:24:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,144 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-07-09 17:24:27,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-07-09 17:24:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:27,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,145 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-07-09 17:24:27,346 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-07-09 17:24:27,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401606235] [2021-07-09 17:24:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401606235] [2021-07-09 17:24:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401606235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559842049] [2021-07-09 17:24:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:27,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:27,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:28,442 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 323 [2021-07-09 17:24:28,553 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-07-09 17:24:28,663 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-07-09 17:24:28,805 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 344 [2021-07-09 17:24:28,963 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 379 [2021-07-09 17:24:29,094 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 336 [2021-07-09 17:24:30,224 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-07-09 17:24:30,384 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-07-09 17:24:30,528 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 277 [2021-07-09 17:24:30,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:30,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:30,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:31,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:31,554 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:31,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:31,555 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559842049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834587815] [2021-07-09 17:24:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:31,585 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,324 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-07-09 17:24:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:24:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,326 INFO L225 Difference]: With dead ends: 1037 [2021-07-09 17:24:32,326 INFO L226 Difference]: Without dead ends: 1021 [2021-07-09 17:24:32,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:24:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-07-09 17:24:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-07-09 17:24:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-07-09 17:24:32,339 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-07-09 17:24:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,339 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-07-09 17:24:32,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-07-09 17:24:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:32,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,340 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:32,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-07-09 17:24:32,541 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-07-09 17:24:32,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:32,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522248903] [2021-07-09 17:24:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:32,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522248903] [2021-07-09 17:24:32,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522248903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983207727] [2021-07-09 17:24:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:32,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:24:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983207727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:32,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566076050] [2021-07-09 17:24:32,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:32,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:32,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:32,645 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,733 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-07-09 17:24:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,734 INFO L225 Difference]: With dead ends: 1214 [2021-07-09 17:24:32,735 INFO L226 Difference]: Without dead ends: 1214 [2021-07-09 17:24:32,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-07-09 17:24:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-07-09 17:24:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-07-09 17:24:32,746 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-07-09 17:24:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:32,746 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-07-09 17:24:32,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-07-09 17:24:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:32,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:32,747 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:32,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11027 [2021-07-09 17:24:32,948 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:32,948 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-07-09 17:24:32,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:32,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410607708] [2021-07-09 17:24:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410607708] [2021-07-09 17:24:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410607708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241275145] [2021-07-09 17:24:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:33,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:33,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:34,600 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 243 [2021-07-09 17:24:34,749 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-07-09 17:24:34,870 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-07-09 17:24:35,005 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 269 [2021-07-09 17:24:35,117 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 267 [2021-07-09 17:24:35,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:35,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:35,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:35,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241275145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:35,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:35,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300511723] [2021-07-09 17:24:35,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:35,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:35,312 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,728 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-07-09 17:24:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,730 INFO L225 Difference]: With dead ends: 956 [2021-07-09 17:24:35,730 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 17:24:35,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 17:24:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-07-09 17:24:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-07-09 17:24:35,741 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-07-09 17:24:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,741 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-07-09 17:24:35,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-07-09 17:24:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:35,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,742 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11028 [2021-07-09 17:24:35,942 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-07-09 17:24:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709411267] [2021-07-09 17:24:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709411267] [2021-07-09 17:24:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709411267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339942474] [2021-07-09 17:24:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:36,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:36,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:36,864 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 246 [2021-07-09 17:24:37,896 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 297 [2021-07-09 17:24:38,075 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 341 [2021-07-09 17:24:38,320 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-07-09 17:24:38,567 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-07-09 17:24:38,822 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 395 [2021-07-09 17:24:39,110 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 447 [2021-07-09 17:24:40,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:40,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:40,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:40,654 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:40,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:40,655 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339942474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:40,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769729885] [2021-07-09 17:24:40,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:40,687 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,221 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-07-09 17:24:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:24:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,223 INFO L225 Difference]: With dead ends: 1019 [2021-07-09 17:24:41,223 INFO L226 Difference]: Without dead ends: 1009 [2021-07-09 17:24:41,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-09 17:24:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-07-09 17:24:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-07-09 17:24:41,235 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-07-09 17:24:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,235 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-07-09 17:24:41,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-07-09 17:24:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:41,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,236 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-07-09 17:24:41,437 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-07-09 17:24:41,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110487211] [2021-07-09 17:24:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110487211] [2021-07-09 17:24:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110487211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494206256] [2021-07-09 17:24:41,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:41,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:42,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:43,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:43,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:43,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:43,518 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:43,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:43,519 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494206256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:43,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:43,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873069804] [2021-07-09 17:24:43,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:43,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:43,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:43,550 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:44,207 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-07-09 17:24:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:24:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:44,209 INFO L225 Difference]: With dead ends: 1100 [2021-07-09 17:24:44,209 INFO L226 Difference]: Without dead ends: 1081 [2021-07-09 17:24:44,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:24:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-07-09 17:24:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-07-09 17:24:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-07-09 17:24:44,221 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-07-09 17:24:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:44,222 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-07-09 17:24:44,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-07-09 17:24:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:44,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:44,223 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:44,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,424 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-07-09 17:24:44,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:44,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903900445] [2021-07-09 17:24:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:44,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903900445] [2021-07-09 17:24:44,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903900445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394230497] [2021-07-09 17:24:44,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:44,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:44,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:44,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:44,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:44,979 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:24:44,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:45,737 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 281 [2021-07-09 17:24:45,974 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-07-09 17:24:46,400 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-07-09 17:24:46,542 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-07-09 17:24:46,671 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 204 [2021-07-09 17:24:47,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:47,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:47,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:48,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:48,078 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:48,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:48,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394230497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:48,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322641478] [2021-07-09 17:24:48,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:48,109 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,970 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-07-09 17:24:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:24:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,972 INFO L225 Difference]: With dead ends: 1077 [2021-07-09 17:24:48,972 INFO L226 Difference]: Without dead ends: 1067 [2021-07-09 17:24:48,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:24:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-09 17:24:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-07-09 17:24:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-07-09 17:24:48,983 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-07-09 17:24:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:48,983 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-07-09 17:24:48,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-07-09 17:24:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:48,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:48,985 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:49,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12108 [2021-07-09 17:24:49,200 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-07-09 17:24:49,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:49,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183506681] [2021-07-09 17:24:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183506681] [2021-07-09 17:24:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183506681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169029910] [2021-07-09 17:24:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:49,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:49,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:49,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:49,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:49,730 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:24:49,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:49,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:51,437 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 328 [2021-07-09 17:24:51,640 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-07-09 17:24:51,821 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-07-09 17:24:52,025 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 350 [2021-07-09 17:24:52,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:52,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:52,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:52,945 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:52,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:52,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:52,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169029910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:52,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108793307] [2021-07-09 17:24:52,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:52,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:52,976 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:53,614 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-07-09 17:24:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:53,616 INFO L225 Difference]: With dead ends: 1009 [2021-07-09 17:24:53,617 INFO L226 Difference]: Without dead ends: 999 [2021-07-09 17:24:53,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:24:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-09 17:24:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-07-09 17:24:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-07-09 17:24:53,633 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-07-09 17:24:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:53,633 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-07-09 17:24:53,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-07-09 17:24:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:53,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:53,635 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:53,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12492,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:53,855 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-07-09 17:24:53,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:53,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886326375] [2021-07-09 17:24:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:53,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:53,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886326375] [2021-07-09 17:24:53,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886326375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561953909] [2021-07-09 17:24:53,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:53,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:53,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:24:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:53,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561953909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:53,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787287349] [2021-07-09 17:24:53,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:53,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:53,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:53,961 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:54,066 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-07-09 17:24:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:24:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:54,069 INFO L225 Difference]: With dead ends: 1576 [2021-07-09 17:24:54,069 INFO L226 Difference]: Without dead ends: 1576 [2021-07-09 17:24:54,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-07-09 17:24:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-07-09 17:24:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-07-09 17:24:54,088 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-07-09 17:24:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:54,088 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-07-09 17:24:54,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-07-09 17:24:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:54,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:54,090 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:54,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12939 [2021-07-09 17:24:54,291 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-07-09 17:24:54,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:54,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783465513] [2021-07-09 17:24:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:54,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:54,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783465513] [2021-07-09 17:24:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783465513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:54,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302741051] [2021-07-09 17:24:54,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:54,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:54,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:54,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:55,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:55,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:55,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:55,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:55,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302741051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:55,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:55,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060519242] [2021-07-09 17:24:55,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:55,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:55,331 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:55,749 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-07-09 17:24:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:55,751 INFO L225 Difference]: With dead ends: 1300 [2021-07-09 17:24:55,751 INFO L226 Difference]: Without dead ends: 1287 [2021-07-09 17:24:55,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-09 17:24:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-07-09 17:24:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-07-09 17:24:55,766 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-07-09 17:24:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:55,766 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-07-09 17:24:55,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-07-09 17:24:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:55,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:55,767 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12940 [2021-07-09 17:24:55,968 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-07-09 17:24:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:55,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349460370] [2021-07-09 17:24:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:56,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349460370] [2021-07-09 17:24:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349460370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309813708] [2021-07-09 17:24:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:56,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:56,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:56,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:56,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:56,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:24:57,640 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-07-09 17:24:57,757 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-07-09 17:24:57,905 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 249 [2021-07-09 17:24:58,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:24:58,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:59,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:59,087 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:24:59,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:59,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:24:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309813708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:59,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071468353] [2021-07-09 17:24:59,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:59,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:59,119 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:59,648 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-07-09 17:24:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:24:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:59,650 INFO L225 Difference]: With dead ends: 1377 [2021-07-09 17:24:59,651 INFO L226 Difference]: Without dead ends: 1365 [2021-07-09 17:24:59,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-07-09 17:24:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-07-09 17:24:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-07-09 17:24:59,665 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-07-09 17:24:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:59,666 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-07-09 17:24:59,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-07-09 17:24:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:59,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:59,667 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13055 [2021-07-09 17:24:59,868 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-07-09 17:24:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237914190] [2021-07-09 17:24:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:59,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237914190] [2021-07-09 17:24:59,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237914190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632638143] [2021-07-09 17:24:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:59,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:59,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:59,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:24:59,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:00,300 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:00,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:00,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:01,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:01,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:02,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:02,424 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:02,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:02,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:02,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632638143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:02,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:02,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:02,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108742326] [2021-07-09 17:25:02,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:02,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:02,455 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:03,071 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-07-09 17:25:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:25:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:03,074 INFO L225 Difference]: With dead ends: 1437 [2021-07-09 17:25:03,074 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:25:03,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:25:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:25:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-07-09 17:25:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-07-09 17:25:03,092 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-07-09 17:25:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:03,093 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-07-09 17:25:03,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-07-09 17:25:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:03,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:03,094 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:03,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:03,295 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-07-09 17:25:03,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:03,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636136659] [2021-07-09 17:25:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:03,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636136659] [2021-07-09 17:25:03,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636136659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597584769] [2021-07-09 17:25:03,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:03,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:03,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:03,805 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:03,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:04,340 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 198 [2021-07-09 17:25:05,228 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 217 [2021-07-09 17:25:05,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:05,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:05,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:06,157 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 239 [2021-07-09 17:25:06,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:06,862 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:06,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:06,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:06,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597584769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:06,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:06,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223349075] [2021-07-09 17:25:06,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:06,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:06,894 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:07,745 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-07-09 17:25:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:25:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:07,748 INFO L225 Difference]: With dead ends: 1415 [2021-07-09 17:25:07,748 INFO L226 Difference]: Without dead ends: 1403 [2021-07-09 17:25:07,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:25:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-07-09 17:25:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-07-09 17:25:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-07-09 17:25:07,765 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-07-09 17:25:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:07,765 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-07-09 17:25:07,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-07-09 17:25:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:07,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:07,767 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:07,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13775,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:07,968 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-07-09 17:25:07,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:07,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741578776] [2021-07-09 17:25:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:08,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741578776] [2021-07-09 17:25:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741578776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021514125] [2021-07-09 17:25:08,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:08,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:25:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:08,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021514125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:08,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:08,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:25:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040393886] [2021-07-09 17:25:08,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:08,081 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:08,156 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-07-09 17:25:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:08,158 INFO L225 Difference]: With dead ends: 1610 [2021-07-09 17:25:08,158 INFO L226 Difference]: Without dead ends: 1610 [2021-07-09 17:25:08,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:25:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-07-09 17:25:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-07-09 17:25:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-07-09 17:25:08,175 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-07-09 17:25:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:08,175 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-07-09 17:25:08,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-07-09 17:25:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:08,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:08,176 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:08,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14175,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:08,379 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-07-09 17:25:08,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:08,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006571425] [2021-07-09 17:25:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:08,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006571425] [2021-07-09 17:25:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006571425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931922226] [2021-07-09 17:25:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:08,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:08,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:08,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:08,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:09,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:09,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:09,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:10,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:10,058 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:10,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:10,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931922226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:10,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079535814] [2021-07-09 17:25:10,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:10,110 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:10,710 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-07-09 17:25:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:10,713 INFO L225 Difference]: With dead ends: 1317 [2021-07-09 17:25:10,713 INFO L226 Difference]: Without dead ends: 1307 [2021-07-09 17:25:10,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 676.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:25:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-07-09 17:25:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-07-09 17:25:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-07-09 17:25:10,732 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-07-09 17:25:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:10,733 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-07-09 17:25:10,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-07-09 17:25:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:10,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:10,735 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:10,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14176,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:10,949 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-07-09 17:25:10,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:10,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837273116] [2021-07-09 17:25:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837273116] [2021-07-09 17:25:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837273116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154806656] [2021-07-09 17:25:10,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:11,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154806656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:11,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:11,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:25:11,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258591424] [2021-07-09 17:25:11,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:11,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:11,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:11,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:11,053 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:11,154 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-07-09 17:25:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:25:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:11,158 INFO L225 Difference]: With dead ends: 2061 [2021-07-09 17:25:11,158 INFO L226 Difference]: Without dead ends: 2061 [2021-07-09 17:25:11,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-09 17:25:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-07-09 17:25:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-07-09 17:25:11,189 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-07-09 17:25:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:11,189 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-07-09 17:25:11,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-07-09 17:25:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:11,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:11,191 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:11,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14384 [2021-07-09 17:25:11,392 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-07-09 17:25:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:11,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238255707] [2021-07-09 17:25:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:11,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238255707] [2021-07-09 17:25:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238255707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290668298] [2021-07-09 17:25:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:11,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:11,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:11,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:11,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:11,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:12,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:12,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:14,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:14,079 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:14,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:14,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:14,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290668298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:14,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:14,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:14,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113219550] [2021-07-09 17:25:14,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:14,119 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:14,852 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-07-09 17:25:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:14,855 INFO L225 Difference]: With dead ends: 1866 [2021-07-09 17:25:14,855 INFO L226 Difference]: Without dead ends: 1856 [2021-07-09 17:25:14,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 793.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:25:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-07-09 17:25:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-07-09 17:25:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-07-09 17:25:14,878 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-07-09 17:25:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:14,878 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-07-09 17:25:14,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-07-09 17:25:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:14,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:14,880 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:15,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14385,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:15,082 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-07-09 17:25:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025676446] [2021-07-09 17:25:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:15,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:15,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025676446] [2021-07-09 17:25:15,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025676446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:15,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945819739] [2021-07-09 17:25:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:15,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:15,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:25:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:15,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945819739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:15,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:15,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:25:15,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464906865] [2021-07-09 17:25:15,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:15,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:15,228 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:15,367 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-07-09 17:25:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:25:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:15,371 INFO L225 Difference]: With dead ends: 2380 [2021-07-09 17:25:15,371 INFO L226 Difference]: Without dead ends: 2380 [2021-07-09 17:25:15,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-09 17:25:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-07-09 17:25:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-07-09 17:25:15,400 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-07-09 17:25:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:15,400 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-07-09 17:25:15,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-07-09 17:25:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:15,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:15,403 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:15,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-07-09 17:25:15,603 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-07-09 17:25:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:15,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582615845] [2021-07-09 17:25:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:15,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582615845] [2021-07-09 17:25:15,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582615845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217652588] [2021-07-09 17:25:15,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:15,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:15,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:15,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:16,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:16,903 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 240 [2021-07-09 17:25:17,101 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 244 [2021-07-09 17:25:17,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:17,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:17,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:17,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217652588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:17,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:17,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:25:17,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270426217] [2021-07-09 17:25:17,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:25:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:25:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:17,359 INFO L87 Difference]: Start difference. First operand 2051 states and 6706 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:17,651 INFO L93 Difference]: Finished difference Result 2076 states and 6747 transitions. [2021-07-09 17:25:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:25:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:17,655 INFO L225 Difference]: With dead ends: 2076 [2021-07-09 17:25:17,655 INFO L226 Difference]: Without dead ends: 2063 [2021-07-09 17:25:17,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-07-09 17:25:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2051. [2021-07-09 17:25:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.270243902439024) internal successors, (6704), 2050 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6704 transitions. [2021-07-09 17:25:17,705 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6704 transitions. Word has length 19 [2021-07-09 17:25:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:17,705 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6704 transitions. [2021-07-09 17:25:17,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6704 transitions. [2021-07-09 17:25:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:17,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:17,708 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14699 [2021-07-09 17:25:17,928 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-07-09 17:25:17,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:17,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451999619] [2021-07-09 17:25:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:18,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:18,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451999619] [2021-07-09 17:25:18,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451999619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:18,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346824745] [2021-07-09 17:25:18,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:18,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:25:18,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:18,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:18,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:19,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:19,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:19,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:19,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346824745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:19,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:19,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:25:19,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785884186] [2021-07-09 17:25:19,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:25:19,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:25:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:19,407 INFO L87 Difference]: Start difference. First operand 2051 states and 6704 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:19,736 INFO L93 Difference]: Finished difference Result 2076 states and 6752 transitions. [2021-07-09 17:25:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:25:19,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:19,739 INFO L225 Difference]: With dead ends: 2076 [2021-07-09 17:25:19,740 INFO L226 Difference]: Without dead ends: 2067 [2021-07-09 17:25:19,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:25:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-09 17:25:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2053. [2021-07-09 17:25:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.269980506822612) internal successors, (6710), 2052 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6710 transitions. [2021-07-09 17:25:19,768 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6710 transitions. Word has length 19 [2021-07-09 17:25:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:19,768 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6710 transitions. [2021-07-09 17:25:19,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6710 transitions. [2021-07-09 17:25:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:19,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:19,771 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:19,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14956,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:19,971 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-07-09 17:25:19,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:19,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568714012] [2021-07-09 17:25:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:20,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568714012] [2021-07-09 17:25:20,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568714012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331522123] [2021-07-09 17:25:20,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:20,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:20,392 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:20,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:21,044 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 292 [2021-07-09 17:25:21,159 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 305 [2021-07-09 17:25:21,320 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 425 [2021-07-09 17:25:22,546 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 357 [2021-07-09 17:25:23,540 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 451 [2021-07-09 17:25:23,947 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-07-09 17:25:24,368 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-07-09 17:25:24,854 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 582 [2021-07-09 17:25:25,393 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 698 [2021-07-09 17:25:25,743 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 511 [2021-07-09 17:25:26,418 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 315 [2021-07-09 17:25:26,835 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-07-09 17:25:26,942 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-07-09 17:25:27,059 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 262 [2021-07-09 17:25:27,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:27,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:27,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:28,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:28,728 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:28,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:28,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331522123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:28,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:25:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026624113] [2021-07-09 17:25:28,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:25:28,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:25:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:28,760 INFO L87 Difference]: Start difference. First operand 2053 states and 6710 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:29,170 INFO L93 Difference]: Finished difference Result 2108 states and 6809 transitions. [2021-07-09 17:25:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:25:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:29,174 INFO L225 Difference]: With dead ends: 2108 [2021-07-09 17:25:29,174 INFO L226 Difference]: Without dead ends: 2098 [2021-07-09 17:25:29,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-07-09 17:25:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2052. [2021-07-09 17:25:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.270112140419308) internal successors, (6707), 2051 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6707 transitions. [2021-07-09 17:25:29,201 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6707 transitions. Word has length 19 [2021-07-09 17:25:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:29,201 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6707 transitions. [2021-07-09 17:25:29,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6707 transitions. [2021-07-09 17:25:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:29,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:29,203 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:29,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15124,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,404 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash -5033861, now seen corresponding path program 187 times [2021-07-09 17:25:29,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:29,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421778738] [2021-07-09 17:25:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:29,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421778738] [2021-07-09 17:25:29,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421778738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970953843] [2021-07-09 17:25:29,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:29,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:29,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:29,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:31,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:31,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:31,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:32,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:32,307 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:32,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:32,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970953843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:32,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:32,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:32,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663803676] [2021-07-09 17:25:32,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:32,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:32,336 INFO L87 Difference]: Start difference. First operand 2052 states and 6707 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:32,904 INFO L93 Difference]: Finished difference Result 2150 states and 6903 transitions. [2021-07-09 17:25:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:32,908 INFO L225 Difference]: With dead ends: 2150 [2021-07-09 17:25:32,908 INFO L226 Difference]: Without dead ends: 2140 [2021-07-09 17:25:32,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:25:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-07-09 17:25:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2066. [2021-07-09 17:25:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.2677966101694915) internal successors, (6748), 2065 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6748 transitions. [2021-07-09 17:25:32,934 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6748 transitions. Word has length 19 [2021-07-09 17:25:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:32,934 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 6748 transitions. [2021-07-09 17:25:32,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6748 transitions. [2021-07-09 17:25:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:32,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:32,937 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16111 [2021-07-09 17:25:33,137 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 188 times [2021-07-09 17:25:33,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084672975] [2021-07-09 17:25:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:33,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084672975] [2021-07-09 17:25:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084672975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99169346] [2021-07-09 17:25:33,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:33,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:33,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:33,651 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:33,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:33,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:34,364 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 267 [2021-07-09 17:25:34,492 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 281 [2021-07-09 17:25:35,139 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-07-09 17:25:35,277 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-07-09 17:25:35,452 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 286 [2021-07-09 17:25:35,689 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 299 [2021-07-09 17:25:36,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:36,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:36,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:36,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:36,632 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:36,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:36,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:36,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99169346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:36,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:36,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:36,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457107233] [2021-07-09 17:25:36,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:36,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:36,662 INFO L87 Difference]: Start difference. First operand 2066 states and 6748 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:37,236 INFO L93 Difference]: Finished difference Result 2201 states and 7027 transitions. [2021-07-09 17:25:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:37,239 INFO L225 Difference]: With dead ends: 2201 [2021-07-09 17:25:37,239 INFO L226 Difference]: Without dead ends: 2171 [2021-07-09 17:25:37,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 661.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:25:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-07-09 17:25:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2055. [2021-07-09 17:25:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2658227848101267) internal successors, (6708), 2054 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6708 transitions. [2021-07-09 17:25:37,267 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6708 transitions. Word has length 19 [2021-07-09 17:25:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:37,267 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6708 transitions. [2021-07-09 17:25:37,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6708 transitions. [2021-07-09 17:25:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:37,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:37,269 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:37,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16439 [2021-07-09 17:25:37,470 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1478101077, now seen corresponding path program 189 times [2021-07-09 17:25:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448545147] [2021-07-09 17:25:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:37,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448545147] [2021-07-09 17:25:37,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448545147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959095114] [2021-07-09 17:25:37,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:37,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:37,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:38,035 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:38,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:38,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:39,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:39,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:39,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:40,620 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 231 [2021-07-09 17:25:40,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:40,774 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:40,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:40,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959095114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:40,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959984807] [2021-07-09 17:25:40,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:40,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:40,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:40,806 INFO L87 Difference]: Start difference. First operand 2055 states and 6708 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:41,462 INFO L93 Difference]: Finished difference Result 2182 states and 6988 transitions. [2021-07-09 17:25:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:25:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:41,466 INFO L225 Difference]: With dead ends: 2182 [2021-07-09 17:25:41,466 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 17:25:41,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 717.7ms TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:25:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 17:25:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2074. [2021-07-09 17:25:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.263868789194404) internal successors, (6766), 2073 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 6766 transitions. [2021-07-09 17:25:41,494 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 6766 transitions. Word has length 19 [2021-07-09 17:25:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:41,494 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 6766 transitions. [2021-07-09 17:25:41,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 6766 transitions. [2021-07-09 17:25:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:41,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:41,496 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:41,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16811,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,697 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 190 times [2021-07-09 17:25:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844029990] [2021-07-09 17:25:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844029990] [2021-07-09 17:25:41,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844029990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783885891] [2021-07-09 17:25:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:41,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:41,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:42,202 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:42,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:43,057 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 241 [2021-07-09 17:25:43,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:43,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:43,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:44,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:44,366 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:44,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:44,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783885891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:44,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:44,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85180567] [2021-07-09 17:25:44,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:44,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:44,396 INFO L87 Difference]: Start difference. First operand 2074 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:45,108 INFO L93 Difference]: Finished difference Result 2241 states and 7161 transitions. [2021-07-09 17:25:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:45,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:45,111 INFO L225 Difference]: With dead ends: 2241 [2021-07-09 17:25:45,112 INFO L226 Difference]: Without dead ends: 2215 [2021-07-09 17:25:45,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:25:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-07-09 17:25:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2055. [2021-07-09 17:25:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-07-09 17:25:45,139 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-07-09 17:25:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:45,139 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-07-09 17:25:45,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-07-09 17:25:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:45,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:45,141 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:45,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17226,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,341 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 191 times [2021-07-09 17:25:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:45,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959094762] [2021-07-09 17:25:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:45,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959094762] [2021-07-09 17:25:45,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959094762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78074007] [2021-07-09 17:25:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:45,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,833 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:45,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:45,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:47,400 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-07-09 17:25:47,524 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-07-09 17:25:47,709 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 267 [2021-07-09 17:25:48,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:48,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:48,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,686 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:48,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:48,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:48,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78074007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:48,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:48,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:48,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422459142] [2021-07-09 17:25:48,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:48,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:48,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:48,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:48,718 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,349 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2021-07-09 17:25:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,353 INFO L225 Difference]: With dead ends: 2116 [2021-07-09 17:25:49,353 INFO L226 Difference]: Without dead ends: 2106 [2021-07-09 17:25:49,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:25:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-07-09 17:25:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2055. [2021-07-09 17:25:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-07-09 17:25:49,379 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-07-09 17:25:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,379 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-07-09 17:25:49,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-07-09 17:25:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:49,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,382 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-07-09 17:25:49,582 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 192 times [2021-07-09 17:25:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853573143] [2021-07-09 17:25:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853573143] [2021-07-09 17:25:49,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853573143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476943474] [2021-07-09 17:25:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:49,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:49,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:49,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:50,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:50,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:50,713 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 297 [2021-07-09 17:25:51,727 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-07-09 17:25:51,857 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-07-09 17:25:51,999 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 285 [2021-07-09 17:25:52,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:52,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:52,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:52,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476943474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:52,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:52,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253158584] [2021-07-09 17:25:52,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:52,226 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:52,677 INFO L93 Difference]: Finished difference Result 2086 states and 6761 transitions. [2021-07-09 17:25:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:25:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:25:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:52,681 INFO L225 Difference]: With dead ends: 2086 [2021-07-09 17:25:52,681 INFO L226 Difference]: Without dead ends: 2075 [2021-07-09 17:25:52,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-07-09 17:25:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2055. [2021-07-09 17:25:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-07-09 17:25:52,710 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-07-09 17:25:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:52,710 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-07-09 17:25:52,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-07-09 17:25:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:25:52,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:52,713 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:52,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,913 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:52,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 193 times [2021-07-09 17:25:52,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:52,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764513465] [2021-07-09 17:25:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:53,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:53,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764513465] [2021-07-09 17:25:53,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764513465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:53,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774369792] [2021-07-09 17:25:53,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:53,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:25:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:53,358 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:25:53,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:25:54,155 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 232 [2021-07-09 17:25:55,612 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 283 [2021-07-09 17:25:55,874 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 290 [2021-07-09 17:25:56,172 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-07-09 17:25:56,485 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-07-09 17:25:56,815 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 404 [2021-07-09 17:25:57,147 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 402 [2021-07-09 17:25:57,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:25:58,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:59,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:59,387 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:25:59,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:25:59,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:25:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774369792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114289060] [2021-07-09 17:25:59,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:59,420 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:00,176 INFO L93 Difference]: Finished difference Result 2182 states and 7001 transitions. [2021-07-09 17:26:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:26:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:00,180 INFO L225 Difference]: With dead ends: 2182 [2021-07-09 17:26:00,180 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 17:26:00,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:26:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 17:26:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2055. [2021-07-09 17:26:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-07-09 17:26:00,208 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-07-09 17:26:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:00,208 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-07-09 17:26:00,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-07-09 17:26:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:00,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:00,210 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:00,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18314 [2021-07-09 17:26:00,411 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 194 times [2021-07-09 17:26:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:00,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670869517] [2021-07-09 17:26:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670869517] [2021-07-09 17:26:00,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670869517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923887095] [2021-07-09 17:26:00,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:00,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:00,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:00,854 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:00,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:02,123 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-07-09 17:26:02,229 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-07-09 17:26:02,348 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 225 [2021-07-09 17:26:02,473 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 237 [2021-07-09 17:26:02,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:02,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:03,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:03,128 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:03,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:03,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923887095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690490102] [2021-07-09 17:26:03,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:03,158 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,152 INFO L93 Difference]: Finished difference Result 2292 states and 7285 transitions. [2021-07-09 17:26:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:26:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,156 INFO L225 Difference]: With dead ends: 2292 [2021-07-09 17:26:04,156 INFO L226 Difference]: Without dead ends: 2280 [2021-07-09 17:26:04,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:26:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-07-09 17:26:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2076. [2021-07-09 17:26:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.261686746987952) internal successors, (6768), 2075 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6768 transitions. [2021-07-09 17:26:04,189 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6768 transitions. Word has length 19 [2021-07-09 17:26:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,189 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6768 transitions. [2021-07-09 17:26:04,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6768 transitions. [2021-07-09 17:26:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:04,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,191 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:04,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18885,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,392 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 195 times [2021-07-09 17:26:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:04,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662493693] [2021-07-09 17:26:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662493693] [2021-07-09 17:26:04,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662493693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627572742] [2021-07-09 17:26:04,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:04,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:04,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:04,956 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:04,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:06,295 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 265 [2021-07-09 17:26:06,415 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 219 [2021-07-09 17:26:08,459 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-07-09 17:26:08,674 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-07-09 17:26:08,886 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 392 [2021-07-09 17:26:09,194 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 517 [2021-07-09 17:26:09,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:09,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:09,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:10,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,103 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:10,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627572742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:10,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063371901] [2021-07-09 17:26:10,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:10,135 INFO L87 Difference]: Start difference. First operand 2076 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,198 INFO L93 Difference]: Finished difference Result 2278 states and 7226 transitions. [2021-07-09 17:26:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:26:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,202 INFO L225 Difference]: With dead ends: 2278 [2021-07-09 17:26:11,202 INFO L226 Difference]: Without dead ends: 2266 [2021-07-09 17:26:11,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 896.5ms TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:26:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-07-09 17:26:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2093. [2021-07-09 17:26:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 3.2633843212237093) internal successors, (6827), 2092 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6827 transitions. [2021-07-09 17:26:11,231 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6827 transitions. Word has length 19 [2021-07-09 17:26:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,231 INFO L482 AbstractCegarLoop]: Abstraction has 2093 states and 6827 transitions. [2021-07-09 17:26:11,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6827 transitions. [2021-07-09 17:26:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:11,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,234 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19223 [2021-07-09 17:26:11,434 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 196 times [2021-07-09 17:26:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187102241] [2021-07-09 17:26:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187102241] [2021-07-09 17:26:11,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187102241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761038012] [2021-07-09 17:26:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:11,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,934 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:11,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:13,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:13,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:13,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,465 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:13,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:13,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761038012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:13,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:13,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622157718] [2021-07-09 17:26:13,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:13,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:13,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:13,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:13,497 INFO L87 Difference]: Start difference. First operand 2093 states and 6827 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,527 INFO L93 Difference]: Finished difference Result 2437 states and 7752 transitions. [2021-07-09 17:26:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:26:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,532 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 17:26:14,532 INFO L226 Difference]: Without dead ends: 2423 [2021-07-09 17:26:14,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:26:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-07-09 17:26:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2022. [2021-07-09 17:26:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 3.2300841167738743) internal successors, (6528), 2021 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 6528 transitions. [2021-07-09 17:26:14,562 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 6528 transitions. Word has length 19 [2021-07-09 17:26:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,562 INFO L482 AbstractCegarLoop]: Abstraction has 2022 states and 6528 transitions. [2021-07-09 17:26:14,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 6528 transitions. [2021-07-09 17:26:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:14,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,564 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:14,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19814,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:14,765 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 197 times [2021-07-09 17:26:14,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:14,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735583227] [2021-07-09 17:26:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:14,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735583227] [2021-07-09 17:26:14,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735583227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697658901] [2021-07-09 17:26:14,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:14,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:14,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:26:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697658901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:14,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374207598] [2021-07-09 17:26:14,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:14,873 INFO L87 Difference]: Start difference. First operand 2022 states and 6528 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,968 INFO L93 Difference]: Finished difference Result 2332 states and 7081 transitions. [2021-07-09 17:26:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,971 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 17:26:14,971 INFO L226 Difference]: Without dead ends: 2332 [2021-07-09 17:26:14,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-07-09 17:26:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1261. [2021-07-09 17:26:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-07-09 17:26:14,989 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-07-09 17:26:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,989 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-07-09 17:26:14,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-07-09 17:26:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:14,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,991 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:15,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20067 [2021-07-09 17:26:15,191 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 198 times [2021-07-09 17:26:15,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:15,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062050538] [2021-07-09 17:26:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062050538] [2021-07-09 17:26:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062050538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499702304] [2021-07-09 17:26:15,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:15,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:15,722 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:15,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:15,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:16,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:17,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,170 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:17,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:17,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499702304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:17,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738176566] [2021-07-09 17:26:17,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:17,202 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,962 INFO L93 Difference]: Finished difference Result 1351 states and 4144 transitions. [2021-07-09 17:26:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:26:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,964 INFO L225 Difference]: With dead ends: 1351 [2021-07-09 17:26:17,964 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:26:17,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:26:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:26:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1261. [2021-07-09 17:26:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-07-09 17:26:17,979 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-07-09 17:26:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:17,979 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-07-09 17:26:17,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-07-09 17:26:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:17,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:17,981 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20068 [2021-07-09 17:26:18,181 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 199 times [2021-07-09 17:26:18,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923564723] [2021-07-09 17:26:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923564723] [2021-07-09 17:26:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923564723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982116786] [2021-07-09 17:26:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:26:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982116786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:18,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902668266] [2021-07-09 17:26:18,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:18,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:18,293 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:18,418 INFO L93 Difference]: Finished difference Result 1892 states and 5707 transitions. [2021-07-09 17:26:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:18,421 INFO L225 Difference]: With dead ends: 1892 [2021-07-09 17:26:18,421 INFO L226 Difference]: Without dead ends: 1892 [2021-07-09 17:26:18,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-09 17:26:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1496. [2021-07-09 17:26:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-07-09 17:26:18,441 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-07-09 17:26:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:18,441 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-07-09 17:26:18,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-07-09 17:26:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:18,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:18,443 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20335 [2021-07-09 17:26:18,643 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 200 times [2021-07-09 17:26:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456519232] [2021-07-09 17:26:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:18,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456519232] [2021-07-09 17:26:18,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456519232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195554994] [2021-07-09 17:26:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:18,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:19,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:20,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:20,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:20,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:20,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,697 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:20,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:20,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:20,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195554994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:20,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82277058] [2021-07-09 17:26:20,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:20,729 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,477 INFO L93 Difference]: Finished difference Result 1563 states and 4870 transitions. [2021-07-09 17:26:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:26:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,479 INFO L225 Difference]: With dead ends: 1563 [2021-07-09 17:26:21,479 INFO L226 Difference]: Without dead ends: 1553 [2021-07-09 17:26:21,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:26:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-07-09 17:26:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1496. [2021-07-09 17:26:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-07-09 17:26:21,497 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-07-09 17:26:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,497 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-07-09 17:26:21,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-07-09 17:26:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:21,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,499 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20336 [2021-07-09 17:26:21,699 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 201 times [2021-07-09 17:26:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187090786] [2021-07-09 17:26:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187090786] [2021-07-09 17:26:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187090786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49641257] [2021-07-09 17:26:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:26:21,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:26:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49641257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:21,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:21,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580044740] [2021-07-09 17:26:21,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:21,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:21,811 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,995 INFO L93 Difference]: Finished difference Result 1980 states and 5974 transitions. [2021-07-09 17:26:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,998 INFO L225 Difference]: With dead ends: 1980 [2021-07-09 17:26:21,998 INFO L226 Difference]: Without dead ends: 1980 [2021-07-09 17:26:21,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-09 17:26:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1650. [2021-07-09 17:26:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.187386294724075) internal successors, (5256), 1649 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5256 transitions. [2021-07-09 17:26:22,022 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5256 transitions. Word has length 19 [2021-07-09 17:26:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:22,022 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5256 transitions. [2021-07-09 17:26:22,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5256 transitions. [2021-07-09 17:26:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:22,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:22,024 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:22,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20582 [2021-07-09 17:26:22,225 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 202 times [2021-07-09 17:26:22,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:22,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877661896] [2021-07-09 17:26:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:22,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877661896] [2021-07-09 17:26:22,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877661896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005605811] [2021-07-09 17:26:22,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:22,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:22,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:23,192 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 213 [2021-07-09 17:26:24,209 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 237 [2021-07-09 17:26:24,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:24,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:26:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005605811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:24,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589271483] [2021-07-09 17:26:24,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:24,375 INFO L87 Difference]: Start difference. First operand 1650 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:24,728 INFO L93 Difference]: Finished difference Result 1674 states and 5294 transitions. [2021-07-09 17:26:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:26:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:24,731 INFO L225 Difference]: With dead ends: 1674 [2021-07-09 17:26:24,731 INFO L226 Difference]: Without dead ends: 1661 [2021-07-09 17:26:24,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-09 17:26:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1650. [2021-07-09 17:26:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.1861734384475437) internal successors, (5254), 1649 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5254 transitions. [2021-07-09 17:26:24,750 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5254 transitions. Word has length 19 [2021-07-09 17:26:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5254 transitions. [2021-07-09 17:26:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5254 transitions. [2021-07-09 17:26:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:24,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:24,752 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:24,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20583,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,953 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 203 times [2021-07-09 17:26:24,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:24,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400216268] [2021-07-09 17:26:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:25,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400216268] [2021-07-09 17:26:25,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400216268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568428527] [2021-07-09 17:26:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:25,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:25,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:25,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:25,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:26:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568428527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:25,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690913275] [2021-07-09 17:26:25,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:25,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:25,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:25,787 INFO L87 Difference]: Start difference. First operand 1650 states and 5254 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:26,146 INFO L93 Difference]: Finished difference Result 1675 states and 5302 transitions. [2021-07-09 17:26:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:26,149 INFO L225 Difference]: With dead ends: 1675 [2021-07-09 17:26:26,149 INFO L226 Difference]: Without dead ends: 1666 [2021-07-09 17:26:26,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:26:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-07-09 17:26:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2021-07-09 17:26:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.1859479103573594) internal successors, (5260), 1651 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5260 transitions. [2021-07-09 17:26:26,191 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5260 transitions. Word has length 19 [2021-07-09 17:26:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:26,191 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 5260 transitions. [2021-07-09 17:26:26,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5260 transitions. [2021-07-09 17:26:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:26,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:26,193 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:26,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20834,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,393 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 204 times [2021-07-09 17:26:26,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:26,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298528230] [2021-07-09 17:26:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:26,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298528230] [2021-07-09 17:26:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298528230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882660982] [2021-07-09 17:26:26,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:26,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:26,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:28,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:28,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:29,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:29,692 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:29,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:29,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882660982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:29,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:29,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761909212] [2021-07-09 17:26:29,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:29,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:29,724 INFO L87 Difference]: Start difference. First operand 1652 states and 5260 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:30,152 INFO L93 Difference]: Finished difference Result 1724 states and 5414 transitions. [2021-07-09 17:26:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:26:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:30,155 INFO L225 Difference]: With dead ends: 1724 [2021-07-09 17:26:30,155 INFO L226 Difference]: Without dead ends: 1714 [2021-07-09 17:26:30,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-07-09 17:26:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-07-09 17:26:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-07-09 17:26:30,177 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-07-09 17:26:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:30,178 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-07-09 17:26:30,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-07-09 17:26:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:30,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:30,179 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:30,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20930,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,380 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 205 times [2021-07-09 17:26:30,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:30,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357706774] [2021-07-09 17:26:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:30,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357706774] [2021-07-09 17:26:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357706774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974210809] [2021-07-09 17:26:30,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:30,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:30,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:32,225 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 233 [2021-07-09 17:26:32,337 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 238 [2021-07-09 17:26:32,498 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 321 [2021-07-09 17:26:33,702 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-07-09 17:26:33,842 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-07-09 17:26:33,997 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 321 [2021-07-09 17:26:34,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:34,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:35,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,351 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:35,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:35,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974210809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:35,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:26:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599980580] [2021-07-09 17:26:35,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:26:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:26:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:35,382 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:36,101 INFO L93 Difference]: Finished difference Result 1757 states and 5501 transitions. [2021-07-09 17:26:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:26:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:36,104 INFO L225 Difference]: With dead ends: 1757 [2021-07-09 17:26:36,104 INFO L226 Difference]: Without dead ends: 1747 [2021-07-09 17:26:36,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:26:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-09 17:26:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1651. [2021-07-09 17:26:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-07-09 17:26:36,124 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-07-09 17:26:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,124 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-07-09 17:26:36,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-07-09 17:26:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:36,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:36,126 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:36,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21384,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,327 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 206 times [2021-07-09 17:26:36,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:36,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018788351] [2021-07-09 17:26:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018788351] [2021-07-09 17:26:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018788351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649668402] [2021-07-09 17:26:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:36,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:36,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:36,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:37,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 257 [2021-07-09 17:26:38,146 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-07-09 17:26:38,325 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-07-09 17:26:38,549 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 335 [2021-07-09 17:26:38,811 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 392 [2021-07-09 17:26:39,588 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 149 [2021-07-09 17:26:39,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:39,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:40,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,137 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:40,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:40,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649668402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:40,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933105573] [2021-07-09 17:26:40,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:40,169 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:41,009 INFO L93 Difference]: Finished difference Result 1826 states and 5698 transitions. [2021-07-09 17:26:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:26:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:41,012 INFO L225 Difference]: With dead ends: 1826 [2021-07-09 17:26:41,012 INFO L226 Difference]: Without dead ends: 1816 [2021-07-09 17:26:41,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:26:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-07-09 17:26:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1651. [2021-07-09 17:26:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-07-09 17:26:41,033 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-07-09 17:26:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:41,033 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-07-09 17:26:41,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-07-09 17:26:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:41,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:41,035 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:41,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,235 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 207 times [2021-07-09 17:26:41,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:41,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650109342] [2021-07-09 17:26:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:41,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650109342] [2021-07-09 17:26:41,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650109342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778589965] [2021-07-09 17:26:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:26:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:41,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:41,753 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:41,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:42,270 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 199 [2021-07-09 17:26:42,762 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 211 [2021-07-09 17:26:43,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:43,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:44,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,307 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:44,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:44,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778589965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:44,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:26:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531965348] [2021-07-09 17:26:44,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:26:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:26:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:44,339 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:45,149 INFO L93 Difference]: Finished difference Result 1724 states and 5388 transitions. [2021-07-09 17:26:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:26:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:45,152 INFO L225 Difference]: With dead ends: 1724 [2021-07-09 17:26:45,152 INFO L226 Difference]: Without dead ends: 1714 [2021-07-09 17:26:45,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:26:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-07-09 17:26:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-07-09 17:26:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-07-09 17:26:45,175 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-07-09 17:26:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:45,175 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-07-09 17:26:45,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-07-09 17:26:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:45,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:45,177 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:45,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22338 [2021-07-09 17:26:45,377 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 208 times [2021-07-09 17:26:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:45,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77305280] [2021-07-09 17:26:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:45,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:45,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77305280] [2021-07-09 17:26:45,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77305280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836582917] [2021-07-09 17:26:45,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:45,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:45,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:45,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:45,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:46,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:46,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:26:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:46,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836582917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:46,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:26:46,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415398350] [2021-07-09 17:26:46,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:26:46,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:26:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:46,277 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:46,766 INFO L93 Difference]: Finished difference Result 1678 states and 5309 transitions. [2021-07-09 17:26:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:46,769 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 17:26:46,769 INFO L226 Difference]: Without dead ends: 1669 [2021-07-09 17:26:46,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-07-09 17:26:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1651. [2021-07-09 17:26:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-07-09 17:26:46,791 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-07-09 17:26:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:46,791 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-07-09 17:26:46,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-07-09 17:26:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:46,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:46,793 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:46,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22765 [2021-07-09 17:26:46,993 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 209 times [2021-07-09 17:26:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360208362] [2021-07-09 17:26:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:47,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:47,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360208362] [2021-07-09 17:26:47,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360208362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:47,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368176264] [2021-07-09 17:26:47,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:47,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:47,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:47,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:47,430 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:47,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:48,608 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2021-07-09 17:26:48,720 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 223 [2021-07-09 17:26:49,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:49,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:49,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,974 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:49,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:49,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:50,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368176264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:50,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:50,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:50,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899978668] [2021-07-09 17:26:50,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:50,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:50,007 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:50,772 INFO L93 Difference]: Finished difference Result 1770 states and 5538 transitions. [2021-07-09 17:26:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:26:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:50,775 INFO L225 Difference]: With dead ends: 1770 [2021-07-09 17:26:50,775 INFO L226 Difference]: Without dead ends: 1760 [2021-07-09 17:26:50,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:26:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-07-09 17:26:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1651. [2021-07-09 17:26:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-07-09 17:26:50,796 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-07-09 17:26:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:50,796 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-07-09 17:26:50,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-07-09 17:26:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:50,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:50,798 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:50,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22875,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:50,999 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 210 times [2021-07-09 17:26:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:50,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976192290] [2021-07-09 17:26:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:51,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976192290] [2021-07-09 17:26:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976192290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559572819] [2021-07-09 17:26:51,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:51,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:51,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:51,457 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:51,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:52,713 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 232 [2021-07-09 17:26:53,769 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 400 [2021-07-09 17:26:54,131 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-07-09 17:26:54,442 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-07-09 17:26:54,753 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 442 [2021-07-09 17:26:55,003 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 361 [2021-07-09 17:26:55,156 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 218 [2021-07-09 17:26:55,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:26:55,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:55,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:26:56,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,203 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:26:56,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:56,204 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:26:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559572819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:56,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:26:56,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789180160] [2021-07-09 17:26:56,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:26:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:26:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:56,234 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:57,066 INFO L93 Difference]: Finished difference Result 1871 states and 5788 transitions. [2021-07-09 17:26:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:26:57,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:57,069 INFO L225 Difference]: With dead ends: 1871 [2021-07-09 17:26:57,069 INFO L226 Difference]: Without dead ends: 1861 [2021-07-09 17:26:57,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:26:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-07-09 17:26:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1631. [2021-07-09 17:26:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.1846625766871166) internal successors, (5191), 1630 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5191 transitions. [2021-07-09 17:26:57,091 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5191 transitions. Word has length 19 [2021-07-09 17:26:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:57,091 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5191 transitions. [2021-07-09 17:26:57,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5191 transitions. [2021-07-09 17:26:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:57,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,092 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23189 [2021-07-09 17:26:57,293 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 211 times [2021-07-09 17:26:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779343804] [2021-07-09 17:26:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779343804] [2021-07-09 17:26:57,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779343804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911148636] [2021-07-09 17:26:57,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:26:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:57,838 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:57,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:57,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:26:59,415 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 229 [2021-07-09 17:26:59,760 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-07-09 17:26:59,971 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-07-09 17:27:00,186 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 383 [2021-07-09 17:27:00,360 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 438 [2021-07-09 17:27:00,581 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 244 [2021-07-09 17:27:01,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:01,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:01,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:01,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,986 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:01,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:01,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:02,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911148636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575111608] [2021-07-09 17:27:02,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:02,049 INFO L87 Difference]: Start difference. First operand 1631 states and 5191 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:03,117 INFO L93 Difference]: Finished difference Result 1825 states and 5631 transitions. [2021-07-09 17:27:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:27:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:03,120 INFO L225 Difference]: With dead ends: 1825 [2021-07-09 17:27:03,120 INFO L226 Difference]: Without dead ends: 1813 [2021-07-09 17:27:03,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 963.2ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:27:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-07-09 17:27:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1647. [2021-07-09 17:27:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1883353584447143) internal successors, (5248), 1646 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5248 transitions. [2021-07-09 17:27:03,141 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5248 transitions. Word has length 19 [2021-07-09 17:27:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:03,141 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5248 transitions. [2021-07-09 17:27:03,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5248 transitions. [2021-07-09 17:27:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:03,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:03,143 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:03,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23825,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:03,344 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 212 times [2021-07-09 17:27:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:03,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760581456] [2021-07-09 17:27:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:27:03,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760581456] [2021-07-09 17:27:03,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760581456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097957250] [2021-07-09 17:27:03,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:03,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:03,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:03,824 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:03,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:05,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:05,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:06,002 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 232 [2021-07-09 17:27:06,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:06,666 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:06,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:06,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097957250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:06,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:06,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:27:06,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741181282] [2021-07-09 17:27:06,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:27:06,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:27:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:06,697 INFO L87 Difference]: Start difference. First operand 1647 states and 5248 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:07,597 INFO L93 Difference]: Finished difference Result 1792 states and 5550 transitions. [2021-07-09 17:27:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:27:07,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:07,599 INFO L225 Difference]: With dead ends: 1792 [2021-07-09 17:27:07,599 INFO L226 Difference]: Without dead ends: 1780 [2021-07-09 17:27:07,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:27:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-07-09 17:27:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1649. [2021-07-09 17:27:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.183859223300971) internal successors, (5247), 1648 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5247 transitions. [2021-07-09 17:27:07,620 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5247 transitions. Word has length 19 [2021-07-09 17:27:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:07,620 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5247 transitions. [2021-07-09 17:27:07,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5247 transitions. [2021-07-09 17:27:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:07,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:07,622 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:07,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24317,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,823 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 213 times [2021-07-09 17:27:07,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:07,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433495041] [2021-07-09 17:27:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:07,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433495041] [2021-07-09 17:27:07,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433495041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192670338] [2021-07-09 17:27:07,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:07,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:08,327 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:08,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:09,042 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-07-09 17:27:09,160 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 262 [2021-07-09 17:27:09,400 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 329 [2021-07-09 17:27:09,534 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 282 [2021-07-09 17:27:09,666 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 246 [2021-07-09 17:27:10,601 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 276 [2021-07-09 17:27:10,755 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 304 [2021-07-09 17:27:11,054 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 354 [2021-07-09 17:27:11,431 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 452 [2021-07-09 17:27:11,890 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 492 [2021-07-09 17:27:12,446 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-07-09 17:27:12,976 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-07-09 17:27:13,540 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 540 [2021-07-09 17:27:13,844 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 427 [2021-07-09 17:27:14,115 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 310 [2021-07-09 17:27:14,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:14,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:14,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:14,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,865 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:14,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:14,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:14,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192670338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:14,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:14,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:14,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606793635] [2021-07-09 17:27:14,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:14,897 INFO L87 Difference]: Start difference. First operand 1649 states and 5247 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:15,742 INFO L93 Difference]: Finished difference Result 1801 states and 5581 transitions. [2021-07-09 17:27:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:27:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:15,745 INFO L225 Difference]: With dead ends: 1801 [2021-07-09 17:27:15,745 INFO L226 Difference]: Without dead ends: 1791 [2021-07-09 17:27:15,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:27:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-07-09 17:27:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1647. [2021-07-09 17:27:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1859052247873634) internal successors, (5244), 1646 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5244 transitions. [2021-07-09 17:27:15,765 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5244 transitions. Word has length 19 [2021-07-09 17:27:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:15,765 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5244 transitions. [2021-07-09 17:27:15,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5244 transitions. [2021-07-09 17:27:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:15,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:15,767 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:15,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24781,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:15,968 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 214 times [2021-07-09 17:27:15,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:15,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283886353] [2021-07-09 17:27:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283886353] [2021-07-09 17:27:16,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283886353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36429774] [2021-07-09 17:27:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:16,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:16,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:16,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:27:16,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36429774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:16,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:27:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61208899] [2021-07-09 17:27:16,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:27:16,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:27:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:27:16,075 INFO L87 Difference]: Start difference. First operand 1647 states and 5244 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:16,184 INFO L93 Difference]: Finished difference Result 2586 states and 8045 transitions. [2021-07-09 17:27:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:16,188 INFO L225 Difference]: With dead ends: 2586 [2021-07-09 17:27:16,188 INFO L226 Difference]: Without dead ends: 2586 [2021-07-09 17:27:16,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-07-09 17:27:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2300. [2021-07-09 17:27:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-07-09 17:27:16,218 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-07-09 17:27:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:16,218 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-07-09 17:27:16,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-07-09 17:27:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:16,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:16,220 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:16,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25315 [2021-07-09 17:27:16,421 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 215 times [2021-07-09 17:27:16,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:16,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706015507] [2021-07-09 17:27:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:16,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706015507] [2021-07-09 17:27:16,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706015507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192790724] [2021-07-09 17:27:16,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:16,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:16,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:16,943 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:16,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:18,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:18,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:18,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:18,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,854 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:18,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:18,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:18,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192790724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:18,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707666764] [2021-07-09 17:27:18,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:18,886 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:19,669 INFO L93 Difference]: Finished difference Result 2369 states and 7524 transitions. [2021-07-09 17:27:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:27:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:19,672 INFO L225 Difference]: With dead ends: 2369 [2021-07-09 17:27:19,672 INFO L226 Difference]: Without dead ends: 2359 [2021-07-09 17:27:19,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:27:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-09 17:27:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2300. [2021-07-09 17:27:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-07-09 17:27:19,702 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-07-09 17:27:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:19,702 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-07-09 17:27:19,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-07-09 17:27:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:19,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:19,704 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:19,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25316 [2021-07-09 17:27:19,905 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 216 times [2021-07-09 17:27:19,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:19,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585619098] [2021-07-09 17:27:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:19,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:19,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585619098] [2021-07-09 17:27:19,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585619098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793440339] [2021-07-09 17:27:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:19,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:27:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793440339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:27:20,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989813195] [2021-07-09 17:27:20,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:27:20,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:27:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:27:20,018 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:20,178 INFO L93 Difference]: Finished difference Result 2557 states and 7954 transitions. [2021-07-09 17:27:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:27:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:20,182 INFO L225 Difference]: With dead ends: 2557 [2021-07-09 17:27:20,182 INFO L226 Difference]: Without dead ends: 2557 [2021-07-09 17:27:20,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-07-09 17:27:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2355. [2021-07-09 17:27:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.2196261682242993) internal successors, (7579), 2354 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7579 transitions. [2021-07-09 17:27:20,213 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7579 transitions. Word has length 19 [2021-07-09 17:27:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:20,213 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7579 transitions. [2021-07-09 17:27:20,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7579 transitions. [2021-07-09 17:27:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:20,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:20,215 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:20,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25586,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,416 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 217 times [2021-07-09 17:27:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:20,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764665258] [2021-07-09 17:27:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764665258] [2021-07-09 17:27:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764665258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244647331] [2021-07-09 17:27:20,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:20,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:20,974 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:20,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:21,729 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 337 [2021-07-09 17:27:21,891 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-07-09 17:27:22,053 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-07-09 17:27:22,264 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 362 [2021-07-09 17:27:22,488 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 418 [2021-07-09 17:27:22,853 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 474 [2021-07-09 17:27:23,364 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 249 [2021-07-09 17:27:23,479 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 221 [2021-07-09 17:27:24,039 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 251 [2021-07-09 17:27:24,255 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 340 [2021-07-09 17:27:24,495 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 349 [2021-07-09 17:27:24,869 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 738 DAG size of output: 447 [2021-07-09 17:27:25,353 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-07-09 17:27:25,837 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-07-09 17:27:26,366 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 526 [2021-07-09 17:27:27,162 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 454 [2021-07-09 17:27:27,286 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-07-09 17:27:28,184 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 217 [2021-07-09 17:27:28,319 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-07-09 17:27:28,453 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-07-09 17:27:28,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:28,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:29,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,440 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:29,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:29,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244647331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:29,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:29,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897078118] [2021-07-09 17:27:29,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:29,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:29,473 INFO L87 Difference]: Start difference. First operand 2355 states and 7579 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,291 INFO L93 Difference]: Finished difference Result 2414 states and 7678 transitions. [2021-07-09 17:27:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:27:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,294 INFO L225 Difference]: With dead ends: 2414 [2021-07-09 17:27:30,294 INFO L226 Difference]: Without dead ends: 2404 [2021-07-09 17:27:30,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1008.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:27:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-09 17:27:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2357. [2021-07-09 17:27:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.2181663837011882) internal successors, (7582), 2356 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7582 transitions. [2021-07-09 17:27:30,323 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7582 transitions. Word has length 19 [2021-07-09 17:27:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,323 INFO L482 AbstractCegarLoop]: Abstraction has 2357 states and 7582 transitions. [2021-07-09 17:27:30,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7582 transitions. [2021-07-09 17:27:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:30,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,325 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:30,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25587 [2021-07-09 17:27:30,526 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 218 times [2021-07-09 17:27:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:30,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736765081] [2021-07-09 17:27:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:30,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:30,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736765081] [2021-07-09 17:27:30,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736765081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:30,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749544394] [2021-07-09 17:27:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:30,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:27:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:30,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749544394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:30,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:30,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:27:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229011790] [2021-07-09 17:27:30,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:27:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:27:30,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:27:30,671 INFO L87 Difference]: Start difference. First operand 2357 states and 7582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,880 INFO L93 Difference]: Finished difference Result 2614 states and 8095 transitions. [2021-07-09 17:27:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:27:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,883 INFO L225 Difference]: With dead ends: 2614 [2021-07-09 17:27:30,884 INFO L226 Difference]: Without dead ends: 2614 [2021-07-09 17:27:30,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:27:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-07-09 17:27:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2378. [2021-07-09 17:27:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.216238956668069) internal successors, (7645), 2377 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7645 transitions. [2021-07-09 17:27:30,915 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7645 transitions. Word has length 19 [2021-07-09 17:27:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,915 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 7645 transitions. [2021-07-09 17:27:30,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7645 transitions. [2021-07-09 17:27:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:30,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,917 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:31,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26380,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,118 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 219 times [2021-07-09 17:27:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:31,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686033438] [2021-07-09 17:27:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:31,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686033438] [2021-07-09 17:27:31,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686033438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996800237] [2021-07-09 17:27:31,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:27:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:31,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:27:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:31,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:31,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:31,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:31,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:27:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996800237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:31,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:27:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72833110] [2021-07-09 17:27:31,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:27:31,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:27:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:31,817 INFO L87 Difference]: Start difference. First operand 2378 states and 7645 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:32,222 INFO L93 Difference]: Finished difference Result 2419 states and 7720 transitions. [2021-07-09 17:27:32,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:27:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:32,226 INFO L225 Difference]: With dead ends: 2419 [2021-07-09 17:27:32,226 INFO L226 Difference]: Without dead ends: 2404 [2021-07-09 17:27:32,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-09 17:27:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-07-09 17:27:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.2147058823529413) internal successors, (7651), 2380 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7651 transitions. [2021-07-09 17:27:32,259 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7651 transitions. Word has length 19 [2021-07-09 17:27:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:32,259 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 7651 transitions. [2021-07-09 17:27:32,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7651 transitions. [2021-07-09 17:27:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:32,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:32,261 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26381,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,462 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 220 times [2021-07-09 17:27:32,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516741132] [2021-07-09 17:27:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:32,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516741132] [2021-07-09 17:27:32,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516741132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057221746] [2021-07-09 17:27:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:32,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:32,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:33,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:27:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057221746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:33,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:27:33,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402798014] [2021-07-09 17:27:33,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:27:33,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:27:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:33,640 INFO L87 Difference]: Start difference. First operand 2381 states and 7651 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:34,121 INFO L93 Difference]: Finished difference Result 2420 states and 7731 transitions. [2021-07-09 17:27:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:27:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:34,125 INFO L225 Difference]: With dead ends: 2420 [2021-07-09 17:27:34,125 INFO L226 Difference]: Without dead ends: 2411 [2021-07-09 17:27:34,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-07-09 17:27:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2384. [2021-07-09 17:27:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.214435585396559) internal successors, (7660), 2383 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7660 transitions. [2021-07-09 17:27:34,154 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7660 transitions. Word has length 19 [2021-07-09 17:27:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:34,154 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 7660 transitions. [2021-07-09 17:27:34,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7660 transitions. [2021-07-09 17:27:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:34,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:34,157 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:34,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26477,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,357 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 221 times [2021-07-09 17:27:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:34,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811729299] [2021-07-09 17:27:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:34,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811729299] [2021-07-09 17:27:34,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811729299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897754166] [2021-07-09 17:27:34,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:34,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:34,814 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:34,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:36,245 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 312 [2021-07-09 17:27:36,438 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-07-09 17:27:36,613 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-07-09 17:27:36,812 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 338 [2021-07-09 17:27:37,124 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 384 [2021-07-09 17:27:37,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:37,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:38,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,744 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:38,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:38,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897754166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:38,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:38,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:27:38,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932001397] [2021-07-09 17:27:38,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:27:38,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:27:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:38,778 INFO L87 Difference]: Start difference. First operand 2384 states and 7660 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:39,273 INFO L93 Difference]: Finished difference Result 2508 states and 7952 transitions. [2021-07-09 17:27:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:27:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:39,277 INFO L225 Difference]: With dead ends: 2508 [2021-07-09 17:27:39,277 INFO L226 Difference]: Without dead ends: 2498 [2021-07-09 17:27:39,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-07-09 17:27:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2382. [2021-07-09 17:27:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-07-09 17:27:39,307 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-07-09 17:27:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-07-09 17:27:39,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-07-09 17:27:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:39,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:39,309 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:39,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26589 [2021-07-09 17:27:39,510 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 222 times [2021-07-09 17:27:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:39,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167568547] [2021-07-09 17:27:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:39,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167568547] [2021-07-09 17:27:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167568547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981389202] [2021-07-09 17:27:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:39,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:39,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:39,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:40,031 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:40,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:40,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:41,115 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 239 [2021-07-09 17:27:41,319 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 244 [2021-07-09 17:27:41,424 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 269 [2021-07-09 17:27:41,561 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2021-07-09 17:27:42,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:42,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:42,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,810 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:42,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:42,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:42,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981389202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:42,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:42,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:42,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538801291] [2021-07-09 17:27:42,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:42,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:42,842 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:43,730 INFO L93 Difference]: Finished difference Result 2503 states and 7954 transitions. [2021-07-09 17:27:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:27:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:43,733 INFO L225 Difference]: With dead ends: 2503 [2021-07-09 17:27:43,733 INFO L226 Difference]: Without dead ends: 2493 [2021-07-09 17:27:43,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:27:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-07-09 17:27:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2382. [2021-07-09 17:27:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-07-09 17:27:43,763 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-07-09 17:27:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:43,763 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-07-09 17:27:43,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-07-09 17:27:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:43,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:43,765 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:43,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27140 [2021-07-09 17:27:43,966 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash -440749611, now seen corresponding path program 223 times [2021-07-09 17:27:43,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:43,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290035460] [2021-07-09 17:27:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:27:44,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290035460] [2021-07-09 17:27:44,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290035460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909044394] [2021-07-09 17:27:44,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:44,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:44,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:44,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:45,622 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-07-09 17:27:45,741 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-07-09 17:27:45,873 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 244 [2021-07-09 17:27:46,015 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 241 [2021-07-09 17:27:46,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:46,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:47,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:47,110 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:47,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:47,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909044394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:47,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:47,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:27:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110711908] [2021-07-09 17:27:47,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:27:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:27:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:47,140 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:48,173 INFO L93 Difference]: Finished difference Result 2624 states and 8231 transitions. [2021-07-09 17:27:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:27:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:48,178 INFO L225 Difference]: With dead ends: 2624 [2021-07-09 17:27:48,178 INFO L226 Difference]: Without dead ends: 2612 [2021-07-09 17:27:48,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:27:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-07-09 17:27:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2395. [2021-07-09 17:27:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-07-09 17:27:48,218 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-07-09 17:27:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:48,218 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-07-09 17:27:48,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-07-09 17:27:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:48,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:48,221 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:48,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27516 [2021-07-09 17:27:48,421 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:48,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 224 times [2021-07-09 17:27:48,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:48,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197010774] [2021-07-09 17:27:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:48,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197010774] [2021-07-09 17:27:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197010774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962954357] [2021-07-09 17:27:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:48,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:48,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:48,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:48,952 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:48,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:49,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:49,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:50,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,766 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:50,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:50,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:50,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962954357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:50,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:50,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27790239] [2021-07-09 17:27:50,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:50,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:50,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:50,797 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:51,711 INFO L93 Difference]: Finished difference Result 2495 states and 7900 transitions. [2021-07-09 17:27:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:27:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:51,715 INFO L225 Difference]: With dead ends: 2495 [2021-07-09 17:27:51,715 INFO L226 Difference]: Without dead ends: 2485 [2021-07-09 17:27:51,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1030.7ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:27:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-07-09 17:27:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2395. [2021-07-09 17:27:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-07-09 17:27:51,749 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-07-09 17:27:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:51,749 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-07-09 17:27:51,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-07-09 17:27:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:51,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:51,752 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:51,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27878 [2021-07-09 17:27:51,952 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 225 times [2021-07-09 17:27:51,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:51,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722149621] [2021-07-09 17:27:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:52,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722149621] [2021-07-09 17:27:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722149621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717469942] [2021-07-09 17:27:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:52,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:52,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:52,495 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:52,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:52,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:27:53,199 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-07-09 17:27:53,307 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-07-09 17:27:53,440 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 306 [2021-07-09 17:27:53,586 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 300 [2021-07-09 17:27:53,697 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2021-07-09 17:27:54,280 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 185 [2021-07-09 17:27:54,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:27:54,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:55,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:55,549 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:27:55,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:55,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:27:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:55,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717469942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:55,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:55,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:27:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939560485] [2021-07-09 17:27:55,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:55,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:55,580 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:56,476 INFO L93 Difference]: Finished difference Result 2453 states and 7797 transitions. [2021-07-09 17:27:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:27:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:56,480 INFO L225 Difference]: With dead ends: 2453 [2021-07-09 17:27:56,480 INFO L226 Difference]: Without dead ends: 2443 [2021-07-09 17:27:56,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1048.8ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:27:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-07-09 17:27:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2395. [2021-07-09 17:27:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-07-09 17:27:56,510 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-07-09 17:27:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:56,510 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-07-09 17:27:56,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-07-09 17:27:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:56,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:56,512 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:56,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28250,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:56,717 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 226 times [2021-07-09 17:27:56,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:56,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647457324] [2021-07-09 17:27:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:56,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647457324] [2021-07-09 17:27:56,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647457324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524505176] [2021-07-09 17:27:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:56,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:56,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:57,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:57,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:27:58,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:58,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:58,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:58,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:27:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:58,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524505176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:58,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:58,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:27:58,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227703459] [2021-07-09 17:27:58,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:27:58,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:27:58,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:58,132 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:58,514 INFO L93 Difference]: Finished difference Result 2431 states and 7773 transitions. [2021-07-09 17:27:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:27:58,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:27:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:58,517 INFO L225 Difference]: With dead ends: 2431 [2021-07-09 17:27:58,517 INFO L226 Difference]: Without dead ends: 2422 [2021-07-09 17:27:58,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-07-09 17:27:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2396. [2021-07-09 17:27:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.215866388308977) internal successors, (7702), 2395 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7702 transitions. [2021-07-09 17:27:58,547 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7702 transitions. Word has length 19 [2021-07-09 17:27:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:58,547 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7702 transitions. [2021-07-09 17:27:58,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7702 transitions. [2021-07-09 17:27:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:27:58,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:58,549 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:58,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28650 [2021-07-09 17:27:58,750 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 227 times [2021-07-09 17:27:58,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:58,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654814535] [2021-07-09 17:27:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:58,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:58,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654814535] [2021-07-09 17:27:58,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654814535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:58,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639923364] [2021-07-09 17:27:58,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:58,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:58,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:58,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:27:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:59,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:00,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:00,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:00,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,599 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:00,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:00,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639923364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:00,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382336152] [2021-07-09 17:28:00,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:00,632 INFO L87 Difference]: Start difference. First operand 2396 states and 7702 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:01,363 INFO L93 Difference]: Finished difference Result 2570 states and 8139 transitions. [2021-07-09 17:28:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:28:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:01,367 INFO L225 Difference]: With dead ends: 2570 [2021-07-09 17:28:01,367 INFO L226 Difference]: Without dead ends: 2560 [2021-07-09 17:28:01,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:28:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-07-09 17:28:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2395. [2021-07-09 17:28:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-07-09 17:28:01,399 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-07-09 17:28:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-07-09 17:28:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-07-09 17:28:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:01,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:01,401 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:01,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28834,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,602 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 228 times [2021-07-09 17:28:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:01,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216377768] [2021-07-09 17:28:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216377768] [2021-07-09 17:28:01,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216377768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225417196] [2021-07-09 17:28:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:28:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:01,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:02,057 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:02,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:03,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:03,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:04,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,098 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:04,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:04,099 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:04,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225417196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:04,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:04,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473259127] [2021-07-09 17:28:04,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:04,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:04,129 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:05,290 INFO L93 Difference]: Finished difference Result 2690 states and 8440 transitions. [2021-07-09 17:28:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:28:05,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:05,294 INFO L225 Difference]: With dead ends: 2690 [2021-07-09 17:28:05,294 INFO L226 Difference]: Without dead ends: 2680 [2021-07-09 17:28:05,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:28:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-07-09 17:28:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2245. [2021-07-09 17:28:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2076648841354722) internal successors, (7198), 2244 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7198 transitions. [2021-07-09 17:28:05,326 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7198 transitions. Word has length 19 [2021-07-09 17:28:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:05,326 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7198 transitions. [2021-07-09 17:28:05,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7198 transitions. [2021-07-09 17:28:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:05,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:05,329 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:05,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29092 [2021-07-09 17:28:05,529 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 229 times [2021-07-09 17:28:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:05,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431308090] [2021-07-09 17:28:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:05,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:05,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431308090] [2021-07-09 17:28:05,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431308090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687215233] [2021-07-09 17:28:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:05,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687215233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:05,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:28:05,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935219830] [2021-07-09 17:28:05,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:28:05,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:28:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:28:05,649 INFO L87 Difference]: Start difference. First operand 2245 states and 7198 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:05,738 INFO L93 Difference]: Finished difference Result 2914 states and 8965 transitions. [2021-07-09 17:28:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:05,742 INFO L225 Difference]: With dead ends: 2914 [2021-07-09 17:28:05,742 INFO L226 Difference]: Without dead ends: 2914 [2021-07-09 17:28:05,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-07-09 17:28:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2672. [2021-07-09 17:28:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 3.2100336952452264) internal successors, (8574), 2671 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 8574 transitions. [2021-07-09 17:28:05,778 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 8574 transitions. Word has length 19 [2021-07-09 17:28:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:05,778 INFO L482 AbstractCegarLoop]: Abstraction has 2672 states and 8574 transitions. [2021-07-09 17:28:05,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 8574 transitions. [2021-07-09 17:28:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:05,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:05,780 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:05,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29452,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:05,981 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 230 times [2021-07-09 17:28:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:05,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743505645] [2021-07-09 17:28:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:06,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743505645] [2021-07-09 17:28:06,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743505645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:06,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597550115] [2021-07-09 17:28:06,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:06,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:06,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:06,449 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:06,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:06,955 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 201 [2021-07-09 17:28:07,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:07,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:08,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,551 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:08,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:08,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:08,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597550115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:08,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984419822] [2021-07-09 17:28:08,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:08,583 INFO L87 Difference]: Start difference. First operand 2672 states and 8574 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:09,913 INFO L93 Difference]: Finished difference Result 3059 states and 9551 transitions. [2021-07-09 17:28:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:28:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:09,917 INFO L225 Difference]: With dead ends: 3059 [2021-07-09 17:28:09,917 INFO L226 Difference]: Without dead ends: 3049 [2021-07-09 17:28:09,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1045.3ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:28:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-09 17:28:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2623. [2021-07-09 17:28:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.2070938215102975) internal successors, (8409), 2622 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 8409 transitions. [2021-07-09 17:28:09,952 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 8409 transitions. Word has length 19 [2021-07-09 17:28:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:09,952 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 8409 transitions. [2021-07-09 17:28:09,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 8409 transitions. [2021-07-09 17:28:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:09,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:09,954 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:10,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29453,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,155 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 231 times [2021-07-09 17:28:10,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:10,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21338682] [2021-07-09 17:28:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:10,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21338682] [2021-07-09 17:28:10,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21338682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045796462] [2021-07-09 17:28:10,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:28:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045796462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:10,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:28:10,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779067404] [2021-07-09 17:28:10,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:28:10,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:10,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:28:10,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:28:10,261 INFO L87 Difference]: Start difference. First operand 2623 states and 8409 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:10,380 INFO L93 Difference]: Finished difference Result 2885 states and 8823 transitions. [2021-07-09 17:28:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:10,384 INFO L225 Difference]: With dead ends: 2885 [2021-07-09 17:28:10,384 INFO L226 Difference]: Without dead ends: 2885 [2021-07-09 17:28:10,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:10,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-07-09 17:28:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2399. [2021-07-09 17:28:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 3.187656380316931) internal successors, (7644), 2398 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 7644 transitions. [2021-07-09 17:28:10,417 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 7644 transitions. Word has length 19 [2021-07-09 17:28:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:10,417 INFO L482 AbstractCegarLoop]: Abstraction has 2399 states and 7644 transitions. [2021-07-09 17:28:10,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 7644 transitions. [2021-07-09 17:28:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:10,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:10,419 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29771 [2021-07-09 17:28:10,620 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 232 times [2021-07-09 17:28:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:10,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489213746] [2021-07-09 17:28:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489213746] [2021-07-09 17:28:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489213746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564594729] [2021-07-09 17:28:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:10,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:11,095 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:11,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:11,613 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 304 [2021-07-09 17:28:12,235 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-07-09 17:28:12,472 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-07-09 17:28:12,725 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 505 [2021-07-09 17:28:13,199 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 569 [2021-07-09 17:28:14,224 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 294 [2021-07-09 17:28:14,770 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 383 [2021-07-09 17:28:15,260 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 295 [2021-07-09 17:28:15,681 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 506 [2021-07-09 17:28:16,327 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-07-09 17:28:16,981 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-07-09 17:28:17,682 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 624 [2021-07-09 17:28:17,993 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 473 [2021-07-09 17:28:18,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:18,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:19,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:19,084 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:19,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:19,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:19,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564594729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:19,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:19,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:19,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136678770] [2021-07-09 17:28:19,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:19,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:19,115 INFO L87 Difference]: Start difference. First operand 2399 states and 7644 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:20,280 INFO L93 Difference]: Finished difference Result 2756 states and 8561 transitions. [2021-07-09 17:28:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:28:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:20,285 INFO L225 Difference]: With dead ends: 2756 [2021-07-09 17:28:20,285 INFO L226 Difference]: Without dead ends: 2744 [2021-07-09 17:28:20,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1092.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:28:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-07-09 17:28:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2477. [2021-07-09 17:28:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.1902261712439417) internal successors, (7899), 2476 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7899 transitions. [2021-07-09 17:28:20,320 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7899 transitions. Word has length 19 [2021-07-09 17:28:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:20,320 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7899 transitions. [2021-07-09 17:28:20,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7899 transitions. [2021-07-09 17:28:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:20,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:20,323 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:20,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29772,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,523 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 233 times [2021-07-09 17:28:20,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:20,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470257332] [2021-07-09 17:28:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:20,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:20,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470257332] [2021-07-09 17:28:20,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470257332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182295047] [2021-07-09 17:28:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:28:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:20,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182295047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:20,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:28:20,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157056633] [2021-07-09 17:28:20,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:28:20,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:28:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:28:20,665 INFO L87 Difference]: Start difference. First operand 2477 states and 7899 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:20,770 INFO L93 Difference]: Finished difference Result 3089 states and 9579 transitions. [2021-07-09 17:28:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:20,774 INFO L225 Difference]: With dead ends: 3089 [2021-07-09 17:28:20,774 INFO L226 Difference]: Without dead ends: 3089 [2021-07-09 17:28:20,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-09 17:28:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2881. [2021-07-09 17:28:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.1899305555555557) internal successors, (9187), 2880 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9187 transitions. [2021-07-09 17:28:20,817 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9187 transitions. Word has length 19 [2021-07-09 17:28:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:20,817 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 9187 transitions. [2021-07-09 17:28:20,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9187 transitions. [2021-07-09 17:28:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:20,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:20,820 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:21,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30406,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:21,021 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 234 times [2021-07-09 17:28:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:21,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36424009] [2021-07-09 17:28:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:21,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:21,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36424009] [2021-07-09 17:28:21,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36424009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:21,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739375553] [2021-07-09 17:28:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:21,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:21,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:21,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:21,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:22,238 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 210 [2021-07-09 17:28:22,390 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 244 [2021-07-09 17:28:23,334 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 226 [2021-07-09 17:28:23,481 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 239 [2021-07-09 17:28:24,450 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 381 [2021-07-09 17:28:24,715 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-07-09 17:28:24,985 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-07-09 17:28:25,303 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 387 [2021-07-09 17:28:25,526 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 282 [2021-07-09 17:28:25,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:25,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:26,469 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 274 [2021-07-09 17:28:26,582 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 251 [2021-07-09 17:28:26,794 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 254 [2021-07-09 17:28:28,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,061 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:28,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:28,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:28,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739375553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:28,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:28,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951388753] [2021-07-09 17:28:28,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:28,092 INFO L87 Difference]: Start difference. First operand 2881 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:29,113 INFO L93 Difference]: Finished difference Result 3023 states and 9474 transitions. [2021-07-09 17:28:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:28:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:29,117 INFO L225 Difference]: With dead ends: 3023 [2021-07-09 17:28:29,117 INFO L226 Difference]: Without dead ends: 3013 [2021-07-09 17:28:29,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:28:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-07-09 17:28:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2883. [2021-07-09 17:28:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1887578070784177) internal successors, (9190), 2882 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9190 transitions. [2021-07-09 17:28:29,159 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9190 transitions. Word has length 19 [2021-07-09 17:28:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:29,159 INFO L482 AbstractCegarLoop]: Abstraction has 2883 states and 9190 transitions. [2021-07-09 17:28:29,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9190 transitions. [2021-07-09 17:28:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:29,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:29,161 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:29,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30407 [2021-07-09 17:28:29,362 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 235 times [2021-07-09 17:28:29,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:29,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213490632] [2021-07-09 17:28:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:29,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213490632] [2021-07-09 17:28:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213490632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953517308] [2021-07-09 17:28:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:29,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953517308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:29,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:28:29,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951820243] [2021-07-09 17:28:29,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:28:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:28:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:28:29,465 INFO L87 Difference]: Start difference. First operand 2883 states and 9190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:29,539 INFO L93 Difference]: Finished difference Result 3131 states and 9825 transitions. [2021-07-09 17:28:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:28:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:29,544 INFO L225 Difference]: With dead ends: 3131 [2021-07-09 17:28:29,544 INFO L226 Difference]: Without dead ends: 3131 [2021-07-09 17:28:29,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-07-09 17:28:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3025. [2021-07-09 17:28:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.181878306878307) internal successors, (9622), 3024 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 9622 transitions. [2021-07-09 17:28:29,583 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 9622 transitions. Word has length 19 [2021-07-09 17:28:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:29,583 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 9622 transitions. [2021-07-09 17:28:29,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 9622 transitions. [2021-07-09 17:28:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:29,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:29,585 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:29,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31140,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,787 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 236 times [2021-07-09 17:28:29,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:29,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655163467] [2021-07-09 17:28:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:29,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:29,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655163467] [2021-07-09 17:28:29,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655163467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132805163] [2021-07-09 17:28:29,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:29,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:29,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:29,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:30,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:31,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:31,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:32,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,988 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:32,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:32,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132805163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:33,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:33,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:28:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986392729] [2021-07-09 17:28:33,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:33,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:33,020 INFO L87 Difference]: Start difference. First operand 3025 states and 9622 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:34,052 INFO L93 Difference]: Finished difference Result 3173 states and 9925 transitions. [2021-07-09 17:28:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:28:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:34,057 INFO L225 Difference]: With dead ends: 3173 [2021-07-09 17:28:34,057 INFO L226 Difference]: Without dead ends: 3163 [2021-07-09 17:28:34,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1091.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:28:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-07-09 17:28:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3021. [2021-07-09 17:28:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 3.1841059602649007) internal successors, (9616), 3020 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 9616 transitions. [2021-07-09 17:28:34,094 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 9616 transitions. Word has length 19 [2021-07-09 17:28:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:34,094 INFO L482 AbstractCegarLoop]: Abstraction has 3021 states and 9616 transitions. [2021-07-09 17:28:34,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 9616 transitions. [2021-07-09 17:28:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:34,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:34,097 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:34,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31141 [2021-07-09 17:28:34,297 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 237 times [2021-07-09 17:28:34,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:34,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303814239] [2021-07-09 17:28:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:34,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:34,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303814239] [2021-07-09 17:28:34,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303814239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930604959] [2021-07-09 17:28:34,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:34,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930604959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:34,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:28:34,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579571107] [2021-07-09 17:28:34,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:28:34,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:28:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:28:34,410 INFO L87 Difference]: Start difference. First operand 3021 states and 9616 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:34,536 INFO L93 Difference]: Finished difference Result 3182 states and 9942 transitions. [2021-07-09 17:28:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:34,541 INFO L225 Difference]: With dead ends: 3182 [2021-07-09 17:28:34,541 INFO L226 Difference]: Without dead ends: 3182 [2021-07-09 17:28:34,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-09 17:28:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3046. [2021-07-09 17:28:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-07-09 17:28:34,581 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-07-09 17:28:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:34,581 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-07-09 17:28:34,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-07-09 17:28:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:34,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:34,584 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:34,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,784 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 238 times [2021-07-09 17:28:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:34,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151397617] [2021-07-09 17:28:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:34,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:34,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151397617] [2021-07-09 17:28:34,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151397617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205587044] [2021-07-09 17:28:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:34,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:34,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:34,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:35,314 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:35,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:35,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:36,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:36,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:37,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,327 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:37,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:37,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205587044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:37,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:28:37,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128175602] [2021-07-09 17:28:37,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:37,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:37,361 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:38,272 INFO L93 Difference]: Finished difference Result 3126 states and 9832 transitions. [2021-07-09 17:28:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:28:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:38,277 INFO L225 Difference]: With dead ends: 3126 [2021-07-09 17:28:38,277 INFO L226 Difference]: Without dead ends: 3116 [2021-07-09 17:28:38,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:28:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-07-09 17:28:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3046. [2021-07-09 17:28:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-07-09 17:28:38,317 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-07-09 17:28:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:38,317 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-07-09 17:28:38,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-07-09 17:28:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:38,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:38,320 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:38,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,521 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 239 times [2021-07-09 17:28:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:38,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925752819] [2021-07-09 17:28:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:38,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:38,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925752819] [2021-07-09 17:28:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925752819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:38,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298392879] [2021-07-09 17:28:38,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:28:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298392879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:38,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:28:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680962616] [2021-07-09 17:28:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:28:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:28:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:28:38,634 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:38,802 INFO L93 Difference]: Finished difference Result 3257 states and 10135 transitions. [2021-07-09 17:28:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:38,807 INFO L225 Difference]: With dead ends: 3257 [2021-07-09 17:28:38,807 INFO L226 Difference]: Without dead ends: 3257 [2021-07-09 17:28:38,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-07-09 17:28:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3085. [2021-07-09 17:28:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.180285343709468) internal successors, (9808), 3084 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9808 transitions. [2021-07-09 17:28:38,847 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9808 transitions. Word has length 19 [2021-07-09 17:28:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:38,848 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9808 transitions. [2021-07-09 17:28:38,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9808 transitions. [2021-07-09 17:28:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:38,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:38,850 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:39,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31804,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:39,051 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:39,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:39,051 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 240 times [2021-07-09 17:28:39,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:39,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734121255] [2021-07-09 17:28:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:39,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734121255] [2021-07-09 17:28:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734121255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726327609] [2021-07-09 17:28:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:39,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:28:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:39,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:28:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:39,633 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:39,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-07-09 17:28:40,107 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 203 [2021-07-09 17:28:41,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:28:41,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:28:41,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,857 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-09 17:28:41,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:41,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-07-09 17:28:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726327609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:41,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:41,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:28:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183092076] [2021-07-09 17:28:41,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:41,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:41,889 INFO L87 Difference]: Start difference. First operand 3085 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:42,858 INFO L93 Difference]: Finished difference Result 3146 states and 9913 transitions. [2021-07-09 17:28:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:28:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:42,863 INFO L225 Difference]: With dead ends: 3146 [2021-07-09 17:28:42,863 INFO L226 Difference]: Without dead ends: 3136 [2021-07-09 17:28:42,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1146.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:28:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-07-09 17:28:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 3087. [2021-07-09 17:28:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.179196370706416) internal successors, (9811), 3086 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 9811 transitions. [2021-07-09 17:28:42,905 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 9811 transitions. Word has length 19 [2021-07-09 17:28:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:42,905 INFO L482 AbstractCegarLoop]: Abstraction has 3087 states and 9811 transitions. [2021-07-09 17:28:42,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 9811 transitions. [2021-07-09 17:28:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:28:42,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:42,908 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:43,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,108 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 241 times [2021-07-09 17:28:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:43,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011235859] [2021-07-09 17:28:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:43,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011235859] [2021-07-09 17:28:43,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011235859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751040672] [2021-07-09 17:28:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:28:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751040672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:43,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:28:43,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326354152] [2021-07-09 17:28:43,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:28:43,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:28:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:28:43,227 INFO L87 Difference]: Start difference. First operand 3087 states and 9811 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:43,421 INFO L93 Difference]: Finished difference Result 3398 states and 10507 transitions. [2021-07-09 17:28:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:28:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:28:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:43,426 INFO L225 Difference]: With dead ends: 3398 [2021-07-09 17:28:43,426 INFO L226 Difference]: Without dead ends: 3398 [2021-07-09 17:28:43,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-07-09 17:28:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3101. [2021-07-09 17:28:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.1783870967741934) internal successors, (9853), 3100 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9853 transitions. [2021-07-09 17:28:43,472 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9853 transitions. Word has length 19 [2021-07-09 17:28:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:43,473 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 9853 transitions. [2021-07-09 17:28:43,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9853 transitions. [2021-07-09 17:28:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:43,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:43,476 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:43,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32229,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,676 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:43,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 242 times [2021-07-09 17:28:43,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:43,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440361586] [2021-07-09 17:28:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440361586] [2021-07-09 17:28:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440361586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107572929] [2021-07-09 17:28:43,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:43,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:28:43,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:44,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:45,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:45,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:28:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107572929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:45,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:28:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897429860] [2021-07-09 17:28:45,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:45,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:45,607 INFO L87 Difference]: Start difference. First operand 3101 states and 9853 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:46,121 INFO L93 Difference]: Finished difference Result 3193 states and 10066 transitions. [2021-07-09 17:28:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:28:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:28:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:46,125 INFO L225 Difference]: With dead ends: 3193 [2021-07-09 17:28:46,125 INFO L226 Difference]: Without dead ends: 3182 [2021-07-09 17:28:46,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-09 17:28:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3124. [2021-07-09 17:28:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-07-09 17:28:46,167 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-07-09 17:28:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:46,167 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-07-09 17:28:46,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-07-09 17:28:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:46,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:46,170 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:46,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32230,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,370 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:46,371 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 243 times [2021-07-09 17:28:46,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:46,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642602257] [2021-07-09 17:28:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:46,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642602257] [2021-07-09 17:28:46,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642602257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968093351] [2021-07-09 17:28:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:28:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:28:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:46,832 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:46,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:48,278 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 238 [2021-07-09 17:28:48,530 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-07-09 17:28:48,794 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-07-09 17:28:49,097 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 331 [2021-07-09 17:28:49,428 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 404 [2021-07-09 17:28:50,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:50,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:28:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:50,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968093351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:50,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865706484] [2021-07-09 17:28:50,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:50,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:50,054 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:50,592 INFO L93 Difference]: Finished difference Result 3211 states and 10096 transitions. [2021-07-09 17:28:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:28:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:28:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:50,597 INFO L225 Difference]: With dead ends: 3211 [2021-07-09 17:28:50,598 INFO L226 Difference]: Without dead ends: 3206 [2021-07-09 17:28:50,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:28:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-07-09 17:28:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3124. [2021-07-09 17:28:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-07-09 17:28:50,648 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-07-09 17:28:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:50,648 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-07-09 17:28:50,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-07-09 17:28:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:50,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:50,652 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:50,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32498 [2021-07-09 17:28:50,856 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 244 times [2021-07-09 17:28:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:50,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814976192] [2021-07-09 17:28:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:50,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814976192] [2021-07-09 17:28:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814976192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138570795] [2021-07-09 17:28:50,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:50,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:28:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:50,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138570795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:28:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692688873] [2021-07-09 17:28:50,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:28:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:28:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:28:50,980 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:51,056 INFO L93 Difference]: Finished difference Result 3606 states and 10977 transitions. [2021-07-09 17:28:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:28:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:51,064 INFO L225 Difference]: With dead ends: 3606 [2021-07-09 17:28:51,064 INFO L226 Difference]: Without dead ends: 3606 [2021-07-09 17:28:51,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:28:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-07-09 17:28:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3155. [2021-07-09 17:28:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.182625237793278) internal successors, (10038), 3154 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 10038 transitions. [2021-07-09 17:28:51,115 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 10038 transitions. Word has length 20 [2021-07-09 17:28:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:51,116 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 10038 transitions. [2021-07-09 17:28:51,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 10038 transitions. [2021-07-09 17:28:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:51,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:51,119 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:51,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32792 [2021-07-09 17:28:51,320 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 245 times [2021-07-09 17:28:51,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:51,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111794076] [2021-07-09 17:28:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:51,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111794076] [2021-07-09 17:28:51,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111794076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062251710] [2021-07-09 17:28:51,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:28:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:28:51,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:51,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:52,350 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 271 [2021-07-09 17:28:52,454 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 271 [2021-07-09 17:28:52,577 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 282 [2021-07-09 17:28:52,841 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 280 [2021-07-09 17:28:52,978 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 276 [2021-07-09 17:28:53,344 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 352 [2021-07-09 17:28:54,562 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 315 [2021-07-09 17:28:54,736 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 356 [2021-07-09 17:28:54,948 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 367 [2021-07-09 17:28:55,179 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-07-09 17:28:55,431 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-07-09 17:28:55,693 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 391 [2021-07-09 17:28:55,860 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 330 [2021-07-09 17:28:56,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:28:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062251710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:56,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:28:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868565140] [2021-07-09 17:28:56,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:28:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:28:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:56,239 INFO L87 Difference]: Start difference. First operand 3155 states and 10038 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:56,602 INFO L93 Difference]: Finished difference Result 3260 states and 10216 transitions. [2021-07-09 17:28:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:28:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:56,607 INFO L225 Difference]: With dead ends: 3260 [2021-07-09 17:28:56,607 INFO L226 Difference]: Without dead ends: 3251 [2021-07-09 17:28:56,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-07-09 17:28:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3158. [2021-07-09 17:28:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-07-09 17:28:56,647 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-07-09 17:28:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:56,647 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-07-09 17:28:56,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-07-09 17:28:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:56,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:56,650 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:56,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32793,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:56,850 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:56,851 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 246 times [2021-07-09 17:28:56,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:56,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954736757] [2021-07-09 17:28:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:56,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:56,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954736757] [2021-07-09 17:28:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954736757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182150299] [2021-07-09 17:28:56,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:56,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:28:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:28:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182150299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:56,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:28:56,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205535815] [2021-07-09 17:28:56,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:28:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:28:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:28:56,989 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:57,088 INFO L93 Difference]: Finished difference Result 3782 states and 11476 transitions. [2021-07-09 17:28:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:28:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:57,096 INFO L225 Difference]: With dead ends: 3782 [2021-07-09 17:28:57,096 INFO L226 Difference]: Without dead ends: 3782 [2021-07-09 17:28:57,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-07-09 17:28:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3158. [2021-07-09 17:28:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-07-09 17:28:57,145 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-07-09 17:28:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:57,146 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-07-09 17:28:57,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-07-09 17:28:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:28:57,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:57,148 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:57,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33222 [2021-07-09 17:28:57,349 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 247 times [2021-07-09 17:28:57,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:57,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202867712] [2021-07-09 17:28:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:57,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:57,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202867712] [2021-07-09 17:28:57,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202867712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:57,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438406770] [2021-07-09 17:28:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:28:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:57,824 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:57,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:58,765 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-07-09 17:28:58,948 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-07-09 17:28:59,141 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 370 [2021-07-09 17:28:59,381 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 413 [2021-07-09 17:29:00,073 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 372 [2021-07-09 17:29:00,848 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 325 [2021-07-09 17:29:01,036 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 402 [2021-07-09 17:29:01,345 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-07-09 17:29:01,683 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-07-09 17:29:02,116 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 521 [2021-07-09 17:29:02,515 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 412 [2021-07-09 17:29:02,680 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 350 [2021-07-09 17:29:02,824 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 268 [2021-07-09 17:29:03,360 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-07-09 17:29:03,512 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-07-09 17:29:03,678 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 229 [2021-07-09 17:29:03,794 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-07-09 17:29:04,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:04,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438406770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:04,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:29:04,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673878553] [2021-07-09 17:29:04,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:29:04,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:04,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:29:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:04,167 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:04,526 INFO L93 Difference]: Finished difference Result 3264 states and 10240 transitions. [2021-07-09 17:29:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:04,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:04,531 INFO L225 Difference]: With dead ends: 3264 [2021-07-09 17:29:04,531 INFO L226 Difference]: Without dead ends: 3257 [2021-07-09 17:29:04,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-07-09 17:29:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3161. [2021-07-09 17:29:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 3.1825949367088606) internal successors, (10057), 3160 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 10057 transitions. [2021-07-09 17:29:04,572 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 10057 transitions. Word has length 20 [2021-07-09 17:29:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:04,573 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 10057 transitions. [2021-07-09 17:29:04,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 10057 transitions. [2021-07-09 17:29:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:04,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:04,575 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:04,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33223,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,776 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 248 times [2021-07-09 17:29:04,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:04,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497021880] [2021-07-09 17:29:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:04,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:04,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497021880] [2021-07-09 17:29:04,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497021880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143296275] [2021-07-09 17:29:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:04,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143296275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:04,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:29:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965943606] [2021-07-09 17:29:04,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:29:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:04,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:29:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:04,921 INFO L87 Difference]: Start difference. First operand 3161 states and 10057 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:05,007 INFO L93 Difference]: Finished difference Result 3795 states and 11521 transitions. [2021-07-09 17:29:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:05,012 INFO L225 Difference]: With dead ends: 3795 [2021-07-09 17:29:05,012 INFO L226 Difference]: Without dead ends: 3795 [2021-07-09 17:29:05,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-07-09 17:29:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3140. [2021-07-09 17:29:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.1815864925135395) internal successors, (9987), 3139 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 9987 transitions. [2021-07-09 17:29:05,056 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 9987 transitions. Word has length 20 [2021-07-09 17:29:05,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:05,056 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 9987 transitions. [2021-07-09 17:29:05,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 9987 transitions. [2021-07-09 17:29:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:05,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:05,059 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:05,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33619 [2021-07-09 17:29:05,261 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 249 times [2021-07-09 17:29:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:05,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153934797] [2021-07-09 17:29:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:05,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153934797] [2021-07-09 17:29:05,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153934797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318743758] [2021-07-09 17:29:05,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:05,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:29:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:05,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318743758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:05,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:29:05,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788558638] [2021-07-09 17:29:05,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:05,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:05,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:05,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:05,378 INFO L87 Difference]: Start difference. First operand 3140 states and 9987 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:05,505 INFO L93 Difference]: Finished difference Result 4051 states and 12203 transitions. [2021-07-09 17:29:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:05,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:05,511 INFO L225 Difference]: With dead ends: 4051 [2021-07-09 17:29:05,511 INFO L226 Difference]: Without dead ends: 4051 [2021-07-09 17:29:05,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-07-09 17:29:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3009. [2021-07-09 17:29:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 3.171542553191489) internal successors, (9540), 3008 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 9540 transitions. [2021-07-09 17:29:05,557 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 9540 transitions. Word has length 20 [2021-07-09 17:29:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:05,557 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 9540 transitions. [2021-07-09 17:29:05,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 9540 transitions. [2021-07-09 17:29:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:05,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:05,560 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:05,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33620 [2021-07-09 17:29:05,765 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash -393864147, now seen corresponding path program 250 times [2021-07-09 17:29:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139701411] [2021-07-09 17:29:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139701411] [2021-07-09 17:29:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139701411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558278737] [2021-07-09 17:29:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:05,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:06,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:06,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:07,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558278737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:07,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:07,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:29:07,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291998255] [2021-07-09 17:29:07,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:29:07,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:29:07,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:07,169 INFO L87 Difference]: Start difference. First operand 3009 states and 9540 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:07,649 INFO L93 Difference]: Finished difference Result 3118 states and 9737 transitions. [2021-07-09 17:29:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:29:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:07,654 INFO L225 Difference]: With dead ends: 3118 [2021-07-09 17:29:07,654 INFO L226 Difference]: Without dead ends: 3095 [2021-07-09 17:29:07,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:29:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-07-09 17:29:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3011. [2021-07-09 17:29:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-07-09 17:29:07,693 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-07-09 17:29:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:07,693 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-07-09 17:29:07,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-07-09 17:29:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:07,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:07,696 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:07,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33621 [2021-07-09 17:29:07,896 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 251 times [2021-07-09 17:29:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:07,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381079634] [2021-07-09 17:29:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:07,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381079634] [2021-07-09 17:29:07,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381079634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970896158] [2021-07-09 17:29:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:08,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:29:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:08,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:29:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:08,436 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:08,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:09,741 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-07-09 17:29:09,872 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-07-09 17:29:10,019 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 258 [2021-07-09 17:29:10,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:10,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970896158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:10,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:10,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:29:10,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290031947] [2021-07-09 17:29:10,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:29:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:29:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:10,987 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:11,346 INFO L93 Difference]: Finished difference Result 3095 states and 9704 transitions. [2021-07-09 17:29:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:11,350 INFO L225 Difference]: With dead ends: 3095 [2021-07-09 17:29:11,350 INFO L226 Difference]: Without dead ends: 3090 [2021-07-09 17:29:11,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-07-09 17:29:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3011. [2021-07-09 17:29:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-07-09 17:29:11,409 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-07-09 17:29:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:11,409 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-07-09 17:29:11,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-07-09 17:29:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:11,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:11,411 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:11,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33775 [2021-07-09 17:29:11,612 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 252 times [2021-07-09 17:29:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:11,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139984812] [2021-07-09 17:29:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139984812] [2021-07-09 17:29:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139984812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664526879] [2021-07-09 17:29:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:11,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:29:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:12,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:12,641 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-07-09 17:29:12,765 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-07-09 17:29:12,920 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-07-09 17:29:13,070 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 288 [2021-07-09 17:29:13,409 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 369 [2021-07-09 17:29:13,815 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 332 [2021-07-09 17:29:13,934 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 269 [2021-07-09 17:29:14,620 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 243 [2021-07-09 17:29:14,772 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 310 [2021-07-09 17:29:14,953 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 329 [2021-07-09 17:29:15,896 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 332 [2021-07-09 17:29:16,183 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 469 [2021-07-09 17:29:16,694 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-07-09 17:29:17,181 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-07-09 17:29:17,736 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 561 [2021-07-09 17:29:17,908 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 305 [2021-07-09 17:29:18,296 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 341 [2021-07-09 17:29:18,410 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 250 [2021-07-09 17:29:18,752 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 244 [2021-07-09 17:29:19,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664526879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:19,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:29:19,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748485116] [2021-07-09 17:29:19,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:29:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:29:19,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:19,096 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,535 INFO L93 Difference]: Finished difference Result 3110 states and 9713 transitions. [2021-07-09 17:29:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,540 INFO L225 Difference]: With dead ends: 3110 [2021-07-09 17:29:19,540 INFO L226 Difference]: Without dead ends: 3101 [2021-07-09 17:29:19,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-07-09 17:29:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3010. [2021-07-09 17:29:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.1665004985044867) internal successors, (9528), 3009 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9528 transitions. [2021-07-09 17:29:19,580 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9528 transitions. Word has length 20 [2021-07-09 17:29:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,580 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9528 transitions. [2021-07-09 17:29:19,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9528 transitions. [2021-07-09 17:29:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:19,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,582 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34134 [2021-07-09 17:29:19,783 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,783 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 253 times [2021-07-09 17:29:19,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802832358] [2021-07-09 17:29:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802832358] [2021-07-09 17:29:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802832358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917560474] [2021-07-09 17:29:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:29:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917560474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:29:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058833834] [2021-07-09 17:29:19,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:19,886 INFO L87 Difference]: Start difference. First operand 3010 states and 9528 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,949 INFO L93 Difference]: Finished difference Result 3282 states and 10018 transitions. [2021-07-09 17:29:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,953 INFO L225 Difference]: With dead ends: 3282 [2021-07-09 17:29:19,954 INFO L226 Difference]: Without dead ends: 3282 [2021-07-09 17:29:19,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-07-09 17:29:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3032. [2021-07-09 17:29:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.167601451666117) internal successors, (9601), 3031 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 9601 transitions. [2021-07-09 17:29:19,994 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 9601 transitions. Word has length 20 [2021-07-09 17:29:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,994 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 9601 transitions. [2021-07-09 17:29:19,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 9601 transitions. [2021-07-09 17:29:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:19,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,996 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:20,197 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 254 times [2021-07-09 17:29:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:20,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988429891] [2021-07-09 17:29:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988429891] [2021-07-09 17:29:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988429891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364570203] [2021-07-09 17:29:20,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:20,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364570203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:29:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520153680] [2021-07-09 17:29:20,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:29:20,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:29:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:20,301 INFO L87 Difference]: Start difference. First operand 3032 states and 9601 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:20,381 INFO L93 Difference]: Finished difference Result 3444 states and 10441 transitions. [2021-07-09 17:29:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:20,386 INFO L225 Difference]: With dead ends: 3444 [2021-07-09 17:29:20,386 INFO L226 Difference]: Without dead ends: 3444 [2021-07-09 17:29:20,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-07-09 17:29:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3015. [2021-07-09 17:29:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.1648971466489715) internal successors, (9539), 3014 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 9539 transitions. [2021-07-09 17:29:20,429 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 9539 transitions. Word has length 20 [2021-07-09 17:29:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:20,430 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 9539 transitions. [2021-07-09 17:29:20,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 9539 transitions. [2021-07-09 17:29:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:20,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:20,432 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:20,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34553 [2021-07-09 17:29:20,633 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 255 times [2021-07-09 17:29:20,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:20,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202551959] [2021-07-09 17:29:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202551959] [2021-07-09 17:29:20,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202551959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069866497] [2021-07-09 17:29:20,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:20,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:29:20,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069866497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:29:20,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211623842] [2021-07-09 17:29:20,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:20,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:20,746 INFO L87 Difference]: Start difference. First operand 3015 states and 9539 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:20,856 INFO L93 Difference]: Finished difference Result 3807 states and 11446 transitions. [2021-07-09 17:29:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:20,861 INFO L225 Difference]: With dead ends: 3807 [2021-07-09 17:29:20,861 INFO L226 Difference]: Without dead ends: 3807 [2021-07-09 17:29:20,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-07-09 17:29:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2940. [2021-07-09 17:29:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.159918339571283) internal successors, (9287), 2939 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9287 transitions. [2021-07-09 17:29:20,903 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9287 transitions. Word has length 20 [2021-07-09 17:29:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:20,903 INFO L482 AbstractCegarLoop]: Abstraction has 2940 states and 9287 transitions. [2021-07-09 17:29:20,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9287 transitions. [2021-07-09 17:29:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:20,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:20,906 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:21,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34554 [2021-07-09 17:29:21,116 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 256 times [2021-07-09 17:29:21,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:21,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822507944] [2021-07-09 17:29:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:21,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822507944] [2021-07-09 17:29:21,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822507944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736845056] [2021-07-09 17:29:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736845056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:21,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:29:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613284769] [2021-07-09 17:29:21,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:21,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:21,231 INFO L87 Difference]: Start difference. First operand 2940 states and 9287 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:21,393 INFO L93 Difference]: Finished difference Result 4596 states and 14016 transitions. [2021-07-09 17:29:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:21,401 INFO L225 Difference]: With dead ends: 4596 [2021-07-09 17:29:21,401 INFO L226 Difference]: Without dead ends: 4596 [2021-07-09 17:29:21,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-07-09 17:29:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3707. [2021-07-09 17:29:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 3.1813275769023206) internal successors, (11790), 3706 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 11790 transitions. [2021-07-09 17:29:21,461 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 11790 transitions. Word has length 20 [2021-07-09 17:29:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 3707 states and 11790 transitions. [2021-07-09 17:29:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 11790 transitions. [2021-07-09 17:29:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:21,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:21,464 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:21,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34555,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,665 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 257 times [2021-07-09 17:29:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:21,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088635855] [2021-07-09 17:29:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:29:21,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088635855] [2021-07-09 17:29:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088635855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838830713] [2021-07-09 17:29:21,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:29:21,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:22,105 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:22,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:22,801 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 286 [2021-07-09 17:29:22,993 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 284 [2021-07-09 17:29:23,216 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 305 [2021-07-09 17:29:23,357 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2021-07-09 17:29:23,475 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-07-09 17:29:23,974 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 268 [2021-07-09 17:29:24,121 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 191 [2021-07-09 17:29:24,740 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 256 [2021-07-09 17:29:24,960 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-07-09 17:29:25,201 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-07-09 17:29:25,439 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 272 [2021-07-09 17:29:25,616 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 316 [2021-07-09 17:29:26,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:26,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838830713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:26,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:29:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924039303] [2021-07-09 17:29:26,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:26,560 INFO L87 Difference]: Start difference. First operand 3707 states and 11790 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:26,837 INFO L93 Difference]: Finished difference Result 3745 states and 11853 transitions. [2021-07-09 17:29:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:29:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:26,843 INFO L225 Difference]: With dead ends: 3745 [2021-07-09 17:29:26,843 INFO L226 Difference]: Without dead ends: 3721 [2021-07-09 17:29:26,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:29:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-07-09 17:29:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3708. [2021-07-09 17:29:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.1810089020771515) internal successors, (11792), 3707 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 11792 transitions. [2021-07-09 17:29:26,892 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 11792 transitions. Word has length 20 [2021-07-09 17:29:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:26,892 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 11792 transitions. [2021-07-09 17:29:26,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 11792 transitions. [2021-07-09 17:29:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:26,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:26,895 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:27,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34556 [2021-07-09 17:29:27,096 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 258 times [2021-07-09 17:29:27,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:27,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586976683] [2021-07-09 17:29:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:27,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586976683] [2021-07-09 17:29:27,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586976683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533720769] [2021-07-09 17:29:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:27,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:29:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:27,540 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:27,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:27,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:28,210 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 278 [2021-07-09 17:29:28,459 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 329 [2021-07-09 17:29:28,569 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 262 [2021-07-09 17:29:28,809 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 293 [2021-07-09 17:29:29,649 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 237 [2021-07-09 17:29:29,822 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 281 [2021-07-09 17:29:30,066 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 416 [2021-07-09 17:29:30,333 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-07-09 17:29:30,620 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-07-09 17:29:30,915 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 476 [2021-07-09 17:29:31,262 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 525 [2021-07-09 17:29:31,848 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 477 [2021-07-09 17:29:32,495 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-07-09 17:29:32,606 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-07-09 17:29:32,754 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 283 [2021-07-09 17:29:33,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533720769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:33,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:29:33,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575797689] [2021-07-09 17:29:33,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:29:33,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:33,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:29:33,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:33,060 INFO L87 Difference]: Start difference. First operand 3708 states and 11792 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:33,537 INFO L93 Difference]: Finished difference Result 3819 states and 12002 transitions. [2021-07-09 17:29:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:29:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:33,542 INFO L225 Difference]: With dead ends: 3819 [2021-07-09 17:29:33,543 INFO L226 Difference]: Without dead ends: 3798 [2021-07-09 17:29:33,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-07-09 17:29:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3706. [2021-07-09 17:29:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.1813765182186233) internal successors, (11787), 3705 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 11787 transitions. [2021-07-09 17:29:33,596 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 11787 transitions. Word has length 20 [2021-07-09 17:29:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:33,596 INFO L482 AbstractCegarLoop]: Abstraction has 3706 states and 11787 transitions. [2021-07-09 17:29:33,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 11787 transitions. [2021-07-09 17:29:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:33,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:33,599 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:33,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34845 [2021-07-09 17:29:33,800 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 452803937, now seen corresponding path program 259 times [2021-07-09 17:29:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:33,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404110948] [2021-07-09 17:29:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:33,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404110948] [2021-07-09 17:29:33,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404110948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796103365] [2021-07-09 17:29:33,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:34,285 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:34,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:34,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:35,187 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 218 [2021-07-09 17:29:36,163 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 253 [2021-07-09 17:29:36,860 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 211 [2021-07-09 17:29:37,043 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 261 [2021-07-09 17:29:37,230 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-07-09 17:29:37,415 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-07-09 17:29:37,617 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 272 [2021-07-09 17:29:37,767 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 255 [2021-07-09 17:29:38,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:38,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796103365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:38,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:29:38,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037236646] [2021-07-09 17:29:38,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:29:38,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:29:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:38,022 INFO L87 Difference]: Start difference. First operand 3706 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:38,416 INFO L93 Difference]: Finished difference Result 3787 states and 11914 transitions. [2021-07-09 17:29:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:29:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:38,422 INFO L225 Difference]: With dead ends: 3787 [2021-07-09 17:29:38,422 INFO L226 Difference]: Without dead ends: 3758 [2021-07-09 17:29:38,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-07-09 17:29:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3704. [2021-07-09 17:29:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.179044018363489) internal successors, (11772), 3703 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11772 transitions. [2021-07-09 17:29:38,472 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11772 transitions. Word has length 20 [2021-07-09 17:29:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:38,472 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11772 transitions. [2021-07-09 17:29:38,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11772 transitions. [2021-07-09 17:29:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:38,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:38,475 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35236 [2021-07-09 17:29:38,676 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 260 times [2021-07-09 17:29:38,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296210816] [2021-07-09 17:29:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:38,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296210816] [2021-07-09 17:29:38,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296210816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720969989] [2021-07-09 17:29:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:38,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,154 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:39,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:39,933 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 354 [2021-07-09 17:29:40,270 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 280 [2021-07-09 17:29:40,611 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 403 [2021-07-09 17:29:41,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720969989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:41,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:29:41,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453958341] [2021-07-09 17:29:41,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:29:41,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:29:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:41,845 INFO L87 Difference]: Start difference. First operand 3704 states and 11772 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:42,294 INFO L93 Difference]: Finished difference Result 3820 states and 11980 transitions. [2021-07-09 17:29:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:29:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:42,299 INFO L225 Difference]: With dead ends: 3820 [2021-07-09 17:29:42,300 INFO L226 Difference]: Without dead ends: 3801 [2021-07-09 17:29:42,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-07-09 17:29:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3704. [2021-07-09 17:29:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-07-09 17:29:42,346 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-07-09 17:29:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:42,346 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-07-09 17:29:42,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-07-09 17:29:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:42,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:42,349 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:42,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35601 [2021-07-09 17:29:42,549 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 261 times [2021-07-09 17:29:42,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:42,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494827556] [2021-07-09 17:29:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:42,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494827556] [2021-07-09 17:29:42,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494827556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646954334] [2021-07-09 17:29:42,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:29:42,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:43,026 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:43,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:43,647 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 253 [2021-07-09 17:29:43,780 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 315 [2021-07-09 17:29:44,647 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 281 [2021-07-09 17:29:44,767 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 274 [2021-07-09 17:29:45,741 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 252 [2021-07-09 17:29:45,939 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 332 [2021-07-09 17:29:46,298 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-07-09 17:29:46,632 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-07-09 17:29:47,026 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 449 [2021-07-09 17:29:47,539 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 432 [2021-07-09 17:29:47,763 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 229 [2021-07-09 17:29:48,745 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 288 [2021-07-09 17:29:48,875 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-07-09 17:29:49,032 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-07-09 17:29:49,165 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 299 [2021-07-09 17:29:49,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646954334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:29:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434829769] [2021-07-09 17:29:49,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:29:49,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:29:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:49,304 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:49,639 INFO L93 Difference]: Finished difference Result 3872 states and 12169 transitions. [2021-07-09 17:29:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:29:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:49,645 INFO L225 Difference]: With dead ends: 3872 [2021-07-09 17:29:49,645 INFO L226 Difference]: Without dead ends: 3867 [2021-07-09 17:29:49,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-07-09 17:29:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3704. [2021-07-09 17:29:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-07-09 17:29:49,697 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-07-09 17:29:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:49,697 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-07-09 17:29:49,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-07-09 17:29:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:49,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:49,699 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:49,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35895,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,900 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 262 times [2021-07-09 17:29:49,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:49,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050322832] [2021-07-09 17:29:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050322832] [2021-07-09 17:29:49,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050322832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295961129] [2021-07-09 17:29:49,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:50,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:52,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:52,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:52,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:52,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295961129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:29:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373596176] [2021-07-09 17:29:52,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:29:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:29:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:52,217 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,651 INFO L93 Difference]: Finished difference Result 3769 states and 11875 transitions. [2021-07-09 17:29:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,656 INFO L225 Difference]: With dead ends: 3769 [2021-07-09 17:29:52,656 INFO L226 Difference]: Without dead ends: 3760 [2021-07-09 17:29:52,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-07-09 17:29:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3700. [2021-07-09 17:29:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.176263855095972) internal successors, (11749), 3699 states have internal predecessors, (11749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 11749 transitions. [2021-07-09 17:29:52,707 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 11749 transitions. Word has length 20 [2021-07-09 17:29:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,707 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 11749 transitions. [2021-07-09 17:29:52,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 11749 transitions. [2021-07-09 17:29:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:52,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,710 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36523 [2021-07-09 17:29:52,910 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 263 times [2021-07-09 17:29:52,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537009396] [2021-07-09 17:29:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:52,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537009396] [2021-07-09 17:29:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537009396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67617710] [2021-07-09 17:29:52,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:52,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:29:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67617710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:29:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296900128] [2021-07-09 17:29:53,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:29:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:29:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:53,014 INFO L87 Difference]: Start difference. First operand 3700 states and 11749 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,080 INFO L93 Difference]: Finished difference Result 3959 states and 12236 transitions. [2021-07-09 17:29:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,085 INFO L225 Difference]: With dead ends: 3959 [2021-07-09 17:29:53,085 INFO L226 Difference]: Without dead ends: 3959 [2021-07-09 17:29:53,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-07-09 17:29:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3733. [2021-07-09 17:29:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.177652733118971) internal successors, (11859), 3732 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 11859 transitions. [2021-07-09 17:29:53,136 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 11859 transitions. Word has length 20 [2021-07-09 17:29:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,137 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 11859 transitions. [2021-07-09 17:29:53,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 11859 transitions. [2021-07-09 17:29:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:53,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,139 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36817,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,340 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 264 times [2021-07-09 17:29:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112496602] [2021-07-09 17:29:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112496602] [2021-07-09 17:29:53,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112496602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21711032] [2021-07-09 17:29:53,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:29:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21711032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:29:53,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958428873] [2021-07-09 17:29:53,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:53,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:53,449 INFO L87 Difference]: Start difference. First operand 3733 states and 11859 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,547 INFO L93 Difference]: Finished difference Result 4198 states and 12875 transitions. [2021-07-09 17:29:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,554 INFO L225 Difference]: With dead ends: 4198 [2021-07-09 17:29:53,554 INFO L226 Difference]: Without dead ends: 4198 [2021-07-09 17:29:53,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-07-09 17:29:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3725. [2021-07-09 17:29:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.1766917293233083) internal successors, (11830), 3724 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 11830 transitions. [2021-07-09 17:29:53,614 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 11830 transitions. Word has length 20 [2021-07-09 17:29:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,614 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 11830 transitions. [2021-07-09 17:29:53,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 11830 transitions. [2021-07-09 17:29:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:53,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,617 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36818 [2021-07-09 17:29:53,817 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 265 times [2021-07-09 17:29:53,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799262323] [2021-07-09 17:29:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799262323] [2021-07-09 17:29:53,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799262323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90465405] [2021-07-09 17:29:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90465405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:29:53,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630637301] [2021-07-09 17:29:53,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:53,927 INFO L87 Difference]: Start difference. First operand 3725 states and 11830 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,067 INFO L93 Difference]: Finished difference Result 4548 states and 13998 transitions. [2021-07-09 17:29:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,073 INFO L225 Difference]: With dead ends: 4548 [2021-07-09 17:29:54,073 INFO L226 Difference]: Without dead ends: 4548 [2021-07-09 17:29:54,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-07-09 17:29:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3857. [2021-07-09 17:29:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 3.171421161825726) internal successors, (12229), 3856 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 12229 transitions. [2021-07-09 17:29:54,128 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 12229 transitions. Word has length 20 [2021-07-09 17:29:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,128 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 12229 transitions. [2021-07-09 17:29:54,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 12229 transitions. [2021-07-09 17:29:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:54,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,131 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36819,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,331 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 266 times [2021-07-09 17:29:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049473648] [2021-07-09 17:29:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049473648] [2021-07-09 17:29:54,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049473648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248638778] [2021-07-09 17:29:54,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248638778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:29:54,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577214376] [2021-07-09 17:29:54,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:54,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:54,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:54,443 INFO L87 Difference]: Start difference. First operand 3857 states and 12229 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,628 INFO L93 Difference]: Finished difference Result 5083 states and 15588 transitions. [2021-07-09 17:29:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,635 INFO L225 Difference]: With dead ends: 5083 [2021-07-09 17:29:54,635 INFO L226 Difference]: Without dead ends: 5083 [2021-07-09 17:29:54,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:29:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-07-09 17:29:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3996. [2021-07-09 17:29:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 3.17171464330413) internal successors, (12671), 3995 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 12671 transitions. [2021-07-09 17:29:54,696 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 12671 transitions. Word has length 20 [2021-07-09 17:29:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 12671 transitions. [2021-07-09 17:29:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 12671 transitions. [2021-07-09 17:29:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:54,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,699 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36820 [2021-07-09 17:29:54,899 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 267 times [2021-07-09 17:29:54,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308858367] [2021-07-09 17:29:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:54,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308858367] [2021-07-09 17:29:54,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308858367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506100310] [2021-07-09 17:29:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:29:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,339 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:55,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:55,903 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-07-09 17:29:56,006 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-07-09 17:29:56,131 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 279 [2021-07-09 17:29:56,253 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 351 [2021-07-09 17:29:56,389 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 305 [2021-07-09 17:29:57,089 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 261 [2021-07-09 17:29:57,197 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 219 [2021-07-09 17:29:57,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506100310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:57,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:29:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23585984] [2021-07-09 17:29:57,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:29:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:29:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:57,843 INFO L87 Difference]: Start difference. First operand 3996 states and 12671 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,265 INFO L93 Difference]: Finished difference Result 4050 states and 12777 transitions. [2021-07-09 17:29:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:29:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,271 INFO L225 Difference]: With dead ends: 4050 [2021-07-09 17:29:58,271 INFO L226 Difference]: Without dead ends: 4040 [2021-07-09 17:29:58,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-07-09 17:29:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3997. [2021-07-09 17:29:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 3.171921921921922) internal successors, (12675), 3996 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 12675 transitions. [2021-07-09 17:29:58,327 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 12675 transitions. Word has length 20 [2021-07-09 17:29:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,327 INFO L482 AbstractCegarLoop]: Abstraction has 3997 states and 12675 transitions. [2021-07-09 17:29:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 12675 transitions. [2021-07-09 17:29:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:58,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,330 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:58,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36821 [2021-07-09 17:29:58,531 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 268 times [2021-07-09 17:29:58,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:58,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834134894] [2021-07-09 17:29:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:58,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834134894] [2021-07-09 17:29:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834134894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122090929] [2021-07-09 17:29:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:58,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122090929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:29:58,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719483735] [2021-07-09 17:29:58,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:58,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:58,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:58,669 INFO L87 Difference]: Start difference. First operand 3997 states and 12675 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,804 INFO L93 Difference]: Finished difference Result 4890 states and 15000 transitions. [2021-07-09 17:29:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,810 INFO L225 Difference]: With dead ends: 4890 [2021-07-09 17:29:58,810 INFO L226 Difference]: Without dead ends: 4890 [2021-07-09 17:29:58,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-07-09 17:29:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 2217. [2021-07-09 17:29:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.1164259927797833) internal successors, (6906), 2216 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6906 transitions. [2021-07-09 17:29:58,851 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6906 transitions. Word has length 20 [2021-07-09 17:29:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,851 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6906 transitions. [2021-07-09 17:29:58,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6906 transitions. [2021-07-09 17:29:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:58,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,853 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37026,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,054 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 269 times [2021-07-09 17:29:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268439778] [2021-07-09 17:29:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268439778] [2021-07-09 17:29:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268439778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72958489] [2021-07-09 17:29:59,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72958489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:29:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427527705] [2021-07-09 17:29:59,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:59,167 INFO L87 Difference]: Start difference. First operand 2217 states and 6906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,354 INFO L93 Difference]: Finished difference Result 3552 states and 10616 transitions. [2021-07-09 17:29:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:29:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,358 INFO L225 Difference]: With dead ends: 3552 [2021-07-09 17:29:59,359 INFO L226 Difference]: Without dead ends: 3552 [2021-07-09 17:29:59,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:29:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-07-09 17:29:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2210. [2021-07-09 17:29:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.122227252150294) internal successors, (6897), 2209 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6897 transitions. [2021-07-09 17:29:59,392 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6897 transitions. Word has length 20 [2021-07-09 17:29:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,392 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6897 transitions. [2021-07-09 17:29:59,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6897 transitions. [2021-07-09 17:29:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:29:59,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,394 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37027 [2021-07-09 17:29:59,595 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 270 times [2021-07-09 17:29:59,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416349372] [2021-07-09 17:29:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416349372] [2021-07-09 17:29:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416349372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498409340] [2021-07-09 17:29:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:29:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,051 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:00,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:00,728 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 240 [2021-07-09 17:30:01,041 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 287 [2021-07-09 17:30:01,147 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 237 [2021-07-09 17:30:01,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498409340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:01,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431124529] [2021-07-09 17:30:01,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:01,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:01,829 INFO L87 Difference]: Start difference. First operand 2210 states and 6897 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,159 INFO L93 Difference]: Finished difference Result 2235 states and 6947 transitions. [2021-07-09 17:30:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,163 INFO L225 Difference]: With dead ends: 2235 [2021-07-09 17:30:02,163 INFO L226 Difference]: Without dead ends: 2230 [2021-07-09 17:30:02,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-09 17:30:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2208. [2021-07-09 17:30:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.122791119166289) internal successors, (6892), 2207 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6892 transitions. [2021-07-09 17:30:02,192 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6892 transitions. Word has length 20 [2021-07-09 17:30:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,192 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6892 transitions. [2021-07-09 17:30:02,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6892 transitions. [2021-07-09 17:30:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:02,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,195 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37028,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,395 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 271 times [2021-07-09 17:30:02,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569609580] [2021-07-09 17:30:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569609580] [2021-07-09 17:30:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569609580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032984744] [2021-07-09 17:30:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032984744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:02,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:02,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229984302] [2021-07-09 17:30:02,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:02,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:02,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:02,512 INFO L87 Difference]: Start difference. First operand 2208 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,630 INFO L93 Difference]: Finished difference Result 2603 states and 7643 transitions. [2021-07-09 17:30:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,633 INFO L225 Difference]: With dead ends: 2603 [2021-07-09 17:30:02,633 INFO L226 Difference]: Without dead ends: 2603 [2021-07-09 17:30:02,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-09 17:30:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1561. [2021-07-09 17:30:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.0724358974358976) internal successors, (4793), 1560 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4793 transitions. [2021-07-09 17:30:02,657 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4793 transitions. Word has length 20 [2021-07-09 17:30:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,657 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4793 transitions. [2021-07-09 17:30:02,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4793 transitions. [2021-07-09 17:30:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:02,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,659 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37319,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,860 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 272 times [2021-07-09 17:30:02,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255083461] [2021-07-09 17:30:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255083461] [2021-07-09 17:30:02,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255083461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276494446] [2021-07-09 17:30:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:02,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276494446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:02,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:02,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504791209] [2021-07-09 17:30:02,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:02,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:02,980 INFO L87 Difference]: Start difference. First operand 1561 states and 4793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,141 INFO L93 Difference]: Finished difference Result 2319 states and 6788 transitions. [2021-07-09 17:30:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,144 INFO L225 Difference]: With dead ends: 2319 [2021-07-09 17:30:03,144 INFO L226 Difference]: Without dead ends: 2319 [2021-07-09 17:30:03,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-09 17:30:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1568. [2021-07-09 17:30:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.0855137204850034) internal successors, (4835), 1567 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 4835 transitions. [2021-07-09 17:30:03,166 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 4835 transitions. Word has length 20 [2021-07-09 17:30:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,166 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 4835 transitions. [2021-07-09 17:30:03,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 4835 transitions. [2021-07-09 17:30:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:03,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,168 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37320,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,368 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 273 times [2021-07-09 17:30:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423194865] [2021-07-09 17:30:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423194865] [2021-07-09 17:30:03,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423194865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620706592] [2021-07-09 17:30:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620706592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:03,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272424653] [2021-07-09 17:30:03,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:03,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:03,513 INFO L87 Difference]: Start difference. First operand 1568 states and 4835 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,751 INFO L93 Difference]: Finished difference Result 2424 states and 7063 transitions. [2021-07-09 17:30:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,755 INFO L225 Difference]: With dead ends: 2424 [2021-07-09 17:30:03,755 INFO L226 Difference]: Without dead ends: 2424 [2021-07-09 17:30:03,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:30:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-07-09 17:30:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1795. [2021-07-09 17:30:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.092530657748049) internal successors, (5548), 1794 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 5548 transitions. [2021-07-09 17:30:03,780 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 5548 transitions. Word has length 20 [2021-07-09 17:30:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 5548 transitions. [2021-07-09 17:30:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 5548 transitions. [2021-07-09 17:30:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:03,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,782 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37321,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,983 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 274 times [2021-07-09 17:30:03,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902166710] [2021-07-09 17:30:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902166710] [2021-07-09 17:30:04,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902166710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501188016] [2021-07-09 17:30:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:04,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:04,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:04,448 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:04,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:04,957 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-07-09 17:30:05,377 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 261 [2021-07-09 17:30:05,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 261 [2021-07-09 17:30:05,600 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-07-09 17:30:05,715 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 303 [2021-07-09 17:30:06,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501188016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:06,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577481423] [2021-07-09 17:30:06,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:06,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:06,484 INFO L87 Difference]: Start difference. First operand 1795 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:06,959 INFO L93 Difference]: Finished difference Result 1927 states and 5783 transitions. [2021-07-09 17:30:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:06,963 INFO L225 Difference]: With dead ends: 1927 [2021-07-09 17:30:06,963 INFO L226 Difference]: Without dead ends: 1917 [2021-07-09 17:30:06,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-07-09 17:30:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1800. [2021-07-09 17:30:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.093941078376876) internal successors, (5566), 1799 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5566 transitions. [2021-07-09 17:30:06,984 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5566 transitions. Word has length 20 [2021-07-09 17:30:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 5566 transitions. [2021-07-09 17:30:06,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5566 transitions. [2021-07-09 17:30:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:06,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:06,986 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37322,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,187 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 275 times [2021-07-09 17:30:07,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941796099] [2021-07-09 17:30:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941796099] [2021-07-09 17:30:07,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941796099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127844846] [2021-07-09 17:30:07,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127844846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417699482] [2021-07-09 17:30:07,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:07,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:07,306 INFO L87 Difference]: Start difference. First operand 1800 states and 5566 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:07,473 INFO L93 Difference]: Finished difference Result 2241 states and 6581 transitions. [2021-07-09 17:30:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:07,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:07,476 INFO L225 Difference]: With dead ends: 2241 [2021-07-09 17:30:07,476 INFO L226 Difference]: Without dead ends: 2241 [2021-07-09 17:30:07,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-07-09 17:30:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1485. [2021-07-09 17:30:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.0808625336927222) internal successors, (4572), 1484 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4572 transitions. [2021-07-09 17:30:07,498 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4572 transitions. Word has length 20 [2021-07-09 17:30:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4572 transitions. [2021-07-09 17:30:07,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4572 transitions. [2021-07-09 17:30:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:07,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:07,499 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37547 [2021-07-09 17:30:07,700 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 276 times [2021-07-09 17:30:07,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602677063] [2021-07-09 17:30:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602677063] [2021-07-09 17:30:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602677063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444574826] [2021-07-09 17:30:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444574826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:07,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993108800] [2021-07-09 17:30:07,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:07,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:07,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:07,829 INFO L87 Difference]: Start difference. First operand 1485 states and 4572 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,069 INFO L93 Difference]: Finished difference Result 2226 states and 6445 transitions. [2021-07-09 17:30:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,072 INFO L225 Difference]: With dead ends: 2226 [2021-07-09 17:30:08,072 INFO L226 Difference]: Without dead ends: 2226 [2021-07-09 17:30:08,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:30:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-07-09 17:30:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1519. [2021-07-09 17:30:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.0843214756258233) internal successors, (4682), 1518 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4682 transitions. [2021-07-09 17:30:08,093 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4682 transitions. Word has length 20 [2021-07-09 17:30:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,093 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4682 transitions. [2021-07-09 17:30:08,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4682 transitions. [2021-07-09 17:30:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:08,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,094 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37548 [2021-07-09 17:30:08,295 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 277 times [2021-07-09 17:30:08,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30430421] [2021-07-09 17:30:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30430421] [2021-07-09 17:30:08,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30430421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403284789] [2021-07-09 17:30:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:08,851 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:08,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:09,634 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-07-09 17:30:09,741 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-07-09 17:30:09,862 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 293 [2021-07-09 17:30:10,033 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 362 [2021-07-09 17:30:10,888 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 276 [2021-07-09 17:30:11,047 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-07-09 17:30:11,204 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-07-09 17:30:11,437 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 334 [2021-07-09 17:30:11,740 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 369 [2021-07-09 17:30:11,979 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 224 [2021-07-09 17:30:12,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403284789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:12,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610990223] [2021-07-09 17:30:12,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:12,857 INFO L87 Difference]: Start difference. First operand 1519 states and 4682 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,160 INFO L93 Difference]: Finished difference Result 1555 states and 4757 transitions. [2021-07-09 17:30:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,162 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 17:30:13,162 INFO L226 Difference]: Without dead ends: 1550 [2021-07-09 17:30:13,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-07-09 17:30:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1520. [2021-07-09 17:30:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.0849242922975644) internal successors, (4686), 1519 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 4686 transitions. [2021-07-09 17:30:13,179 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 4686 transitions. Word has length 20 [2021-07-09 17:30:13,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,179 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 4686 transitions. [2021-07-09 17:30:13,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 4686 transitions. [2021-07-09 17:30:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:13,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,181 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37549 [2021-07-09 17:30:13,381 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 278 times [2021-07-09 17:30:13,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863092477] [2021-07-09 17:30:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:13,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863092477] [2021-07-09 17:30:13,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863092477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429579011] [2021-07-09 17:30:13,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:13,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429579011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737861885] [2021-07-09 17:30:13,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:13,488 INFO L87 Difference]: Start difference. First operand 1520 states and 4686 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,562 INFO L93 Difference]: Finished difference Result 1775 states and 5123 transitions. [2021-07-09 17:30:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,565 INFO L225 Difference]: With dead ends: 1775 [2021-07-09 17:30:13,565 INFO L226 Difference]: Without dead ends: 1775 [2021-07-09 17:30:13,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-07-09 17:30:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1531. [2021-07-09 17:30:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.08562091503268) internal successors, (4721), 1530 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4721 transitions. [2021-07-09 17:30:13,582 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4721 transitions. Word has length 20 [2021-07-09 17:30:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4721 transitions. [2021-07-09 17:30:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4721 transitions. [2021-07-09 17:30:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:13,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,584 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37970,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,785 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 279 times [2021-07-09 17:30:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925857110] [2021-07-09 17:30:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:13,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925857110] [2021-07-09 17:30:13,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925857110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660277993] [2021-07-09 17:30:13,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:13,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660277993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:13,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947810647] [2021-07-09 17:30:13,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:13,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:13,891 INFO L87 Difference]: Start difference. First operand 1531 states and 4721 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,985 INFO L93 Difference]: Finished difference Result 1802 states and 5179 transitions. [2021-07-09 17:30:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,987 INFO L225 Difference]: With dead ends: 1802 [2021-07-09 17:30:13,987 INFO L226 Difference]: Without dead ends: 1802 [2021-07-09 17:30:13,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-07-09 17:30:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1476. [2021-07-09 17:30:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.079322033898305) internal successors, (4542), 1475 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4542 transitions. [2021-07-09 17:30:14,006 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4542 transitions. Word has length 20 [2021-07-09 17:30:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,006 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4542 transitions. [2021-07-09 17:30:14,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4542 transitions. [2021-07-09 17:30:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:14,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,008 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:14,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37971,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,208 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 280 times [2021-07-09 17:30:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:14,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083209475] [2021-07-09 17:30:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083209475] [2021-07-09 17:30:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083209475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951636199] [2021-07-09 17:30:14,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951636199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010124767] [2021-07-09 17:30:14,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:14,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:14,318 INFO L87 Difference]: Start difference. First operand 1476 states and 4542 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,418 INFO L93 Difference]: Finished difference Result 1732 states and 4957 transitions. [2021-07-09 17:30:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:14,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,420 INFO L225 Difference]: With dead ends: 1732 [2021-07-09 17:30:14,420 INFO L226 Difference]: Without dead ends: 1732 [2021-07-09 17:30:14,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-07-09 17:30:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1312. [2021-07-09 17:30:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.0671243325705566) internal successors, (4021), 1311 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4021 transitions. [2021-07-09 17:30:14,436 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4021 transitions. Word has length 20 [2021-07-09 17:30:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,436 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4021 transitions. [2021-07-09 17:30:14,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4021 transitions. [2021-07-09 17:30:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:14,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,438 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:14,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37972,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,638 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 281 times [2021-07-09 17:30:14,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:14,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652173544] [2021-07-09 17:30:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652173544] [2021-07-09 17:30:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652173544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121002303] [2021-07-09 17:30:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121002303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:14,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862542112] [2021-07-09 17:30:14,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:14,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:14,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:14,775 INFO L87 Difference]: Start difference. First operand 1312 states and 4021 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,906 INFO L93 Difference]: Finished difference Result 1787 states and 5216 transitions. [2021-07-09 17:30:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,908 INFO L225 Difference]: With dead ends: 1787 [2021-07-09 17:30:14,909 INFO L226 Difference]: Without dead ends: 1787 [2021-07-09 17:30:14,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-07-09 17:30:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1538. [2021-07-09 17:30:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.0709173715029277) internal successors, (4720), 1537 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4720 transitions. [2021-07-09 17:30:14,928 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4720 transitions. Word has length 20 [2021-07-09 17:30:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,928 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4720 transitions. [2021-07-09 17:30:14,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4720 transitions. [2021-07-09 17:30:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:14,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,930 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37973 [2021-07-09 17:30:15,130 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 282 times [2021-07-09 17:30:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816248306] [2021-07-09 17:30:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816248306] [2021-07-09 17:30:15,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816248306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112129664] [2021-07-09 17:30:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:15,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112129664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:15,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589489188] [2021-07-09 17:30:15,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:15,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:15,259 INFO L87 Difference]: Start difference. First operand 1538 states and 4720 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:15,478 INFO L93 Difference]: Finished difference Result 1812 states and 5269 transitions. [2021-07-09 17:30:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:15,481 INFO L225 Difference]: With dead ends: 1812 [2021-07-09 17:30:15,482 INFO L226 Difference]: Without dead ends: 1812 [2021-07-09 17:30:15,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-07-09 17:30:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1587. [2021-07-09 17:30:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.0687263556116013) internal successors, (4867), 1586 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4867 transitions. [2021-07-09 17:30:15,502 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4867 transitions. Word has length 20 [2021-07-09 17:30:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:15,502 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4867 transitions. [2021-07-09 17:30:15,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4867 transitions. [2021-07-09 17:30:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:15,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:15,504 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37974 [2021-07-09 17:30:15,704 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,704 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 283 times [2021-07-09 17:30:15,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487130844] [2021-07-09 17:30:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487130844] [2021-07-09 17:30:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487130844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626470238] [2021-07-09 17:30:15,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626470238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:15,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400636425] [2021-07-09 17:30:15,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:15,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:15,830 INFO L87 Difference]: Start difference. First operand 1587 states and 4867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,071 INFO L93 Difference]: Finished difference Result 1938 states and 5602 transitions. [2021-07-09 17:30:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:30:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,074 INFO L225 Difference]: With dead ends: 1938 [2021-07-09 17:30:16,074 INFO L226 Difference]: Without dead ends: 1938 [2021-07-09 17:30:16,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:30:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-07-09 17:30:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1604. [2021-07-09 17:30:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.0679975046787273) internal successors, (4918), 1603 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4918 transitions. [2021-07-09 17:30:16,094 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4918 transitions. Word has length 20 [2021-07-09 17:30:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,095 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 4918 transitions. [2021-07-09 17:30:16,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4918 transitions. [2021-07-09 17:30:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:16,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,096 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37975 [2021-07-09 17:30:16,297 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 284 times [2021-07-09 17:30:16,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220423152] [2021-07-09 17:30:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:16,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220423152] [2021-07-09 17:30:16,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220423152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085363380] [2021-07-09 17:30:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,801 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:16,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:17,395 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 303 [2021-07-09 17:30:17,528 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-07-09 17:30:17,660 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-07-09 17:30:17,819 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 336 [2021-07-09 17:30:17,957 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-07-09 17:30:18,093 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-07-09 17:30:18,243 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 297 [2021-07-09 17:30:18,835 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-07-09 17:30:18,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-07-09 17:30:19,086 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 240 [2021-07-09 17:30:19,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:19,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085363380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:19,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:30:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030007106] [2021-07-09 17:30:19,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:30:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:30:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:19,798 INFO L87 Difference]: Start difference. First operand 1604 states and 4918 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:20,374 INFO L93 Difference]: Finished difference Result 1808 states and 5373 transitions. [2021-07-09 17:30:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:20,377 INFO L225 Difference]: With dead ends: 1808 [2021-07-09 17:30:20,377 INFO L226 Difference]: Without dead ends: 1798 [2021-07-09 17:30:20,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-07-09 17:30:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1653. [2021-07-09 17:30:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-07-09 17:30:20,398 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-07-09 17:30:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:20,398 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-07-09 17:30:20,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-07-09 17:30:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:20,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:20,400 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:20,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37976 [2021-07-09 17:30:20,600 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 285 times [2021-07-09 17:30:20,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:20,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721657326] [2021-07-09 17:30:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721657326] [2021-07-09 17:30:20,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721657326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512822500] [2021-07-09 17:30:20,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:21,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:21,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:21,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512822500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:21,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:30:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938448714] [2021-07-09 17:30:21,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:30:21,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:30:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:21,999 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:22,595 INFO L93 Difference]: Finished difference Result 1770 states and 5320 transitions. [2021-07-09 17:30:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:30:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:22,597 INFO L225 Difference]: With dead ends: 1770 [2021-07-09 17:30:22,598 INFO L226 Difference]: Without dead ends: 1765 [2021-07-09 17:30:22,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:30:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-07-09 17:30:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1653. [2021-07-09 17:30:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-07-09 17:30:22,618 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-07-09 17:30:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:22,618 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-07-09 17:30:22,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-07-09 17:30:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:22,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:22,620 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38314 [2021-07-09 17:30:22,821 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 286 times [2021-07-09 17:30:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:22,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710529378] [2021-07-09 17:30:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:22,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710529378] [2021-07-09 17:30:22,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710529378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658232904] [2021-07-09 17:30:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:22,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:22,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658232904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:22,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:22,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070581768] [2021-07-09 17:30:22,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:22,938 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,006 INFO L93 Difference]: Finished difference Result 1988 states and 5715 transitions. [2021-07-09 17:30:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,009 INFO L225 Difference]: With dead ends: 1988 [2021-07-09 17:30:23,009 INFO L226 Difference]: Without dead ends: 1988 [2021-07-09 17:30:23,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-07-09 17:30:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1661. [2021-07-09 17:30:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.0897590361445784) internal successors, (5129), 1660 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5129 transitions. [2021-07-09 17:30:23,030 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5129 transitions. Word has length 20 [2021-07-09 17:30:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,031 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5129 transitions. [2021-07-09 17:30:23,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5129 transitions. [2021-07-09 17:30:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:23,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,033 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38486,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,233 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 757652935, now seen corresponding path program 287 times [2021-07-09 17:30:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476562014] [2021-07-09 17:30:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476562014] [2021-07-09 17:30:23,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476562014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566905816] [2021-07-09 17:30:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:30:23,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:23,689 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:23,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:24,527 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 259 [2021-07-09 17:30:24,970 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 255 [2021-07-09 17:30:25,111 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 214 [2021-07-09 17:30:25,524 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 336 [2021-07-09 17:30:25,811 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-07-09 17:30:26,085 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-07-09 17:30:26,393 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 380 [2021-07-09 17:30:26,688 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 478 [2021-07-09 17:30:26,875 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 322 [2021-07-09 17:30:27,107 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 207 [2021-07-09 17:30:27,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566905816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:27,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:27,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175645428] [2021-07-09 17:30:27,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:27,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:27,490 INFO L87 Difference]: Start difference. First operand 1661 states and 5129 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:27,952 INFO L93 Difference]: Finished difference Result 1764 states and 5293 transitions. [2021-07-09 17:30:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:30:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:27,954 INFO L225 Difference]: With dead ends: 1764 [2021-07-09 17:30:27,954 INFO L226 Difference]: Without dead ends: 1737 [2021-07-09 17:30:27,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-07-09 17:30:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1661. [2021-07-09 17:30:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.075903614457831) internal successors, (5106), 1660 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5106 transitions. [2021-07-09 17:30:27,974 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5106 transitions. Word has length 20 [2021-07-09 17:30:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,974 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5106 transitions. [2021-07-09 17:30:27,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5106 transitions. [2021-07-09 17:30:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:27,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,976 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:28,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38487,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,176 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 288 times [2021-07-09 17:30:28,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:28,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447903758] [2021-07-09 17:30:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447903758] [2021-07-09 17:30:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447903758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483546381] [2021-07-09 17:30:28,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:28,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483546381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:28,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638882287] [2021-07-09 17:30:28,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:28,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:28,305 INFO L87 Difference]: Start difference. First operand 1661 states and 5106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,532 INFO L93 Difference]: Finished difference Result 2203 states and 6445 transitions. [2021-07-09 17:30:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:28,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,535 INFO L225 Difference]: With dead ends: 2203 [2021-07-09 17:30:28,536 INFO L226 Difference]: Without dead ends: 2203 [2021-07-09 17:30:28,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-07-09 17:30:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1708. [2021-07-09 17:30:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.074985354422964) internal successors, (5249), 1707 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5249 transitions. [2021-07-09 17:30:28,565 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5249 transitions. Word has length 20 [2021-07-09 17:30:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:28,565 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5249 transitions. [2021-07-09 17:30:28,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5249 transitions. [2021-07-09 17:30:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:28,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:28,567 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:28,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38706 [2021-07-09 17:30:28,767 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 289 times [2021-07-09 17:30:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:28,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499937868] [2021-07-09 17:30:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499937868] [2021-07-09 17:30:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499937868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335134591] [2021-07-09 17:30:28,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335134591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557805005] [2021-07-09 17:30:28,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:28,894 INFO L87 Difference]: Start difference. First operand 1708 states and 5249 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,076 INFO L93 Difference]: Finished difference Result 1957 states and 5754 transitions. [2021-07-09 17:30:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,079 INFO L225 Difference]: With dead ends: 1957 [2021-07-09 17:30:29,079 INFO L226 Difference]: Without dead ends: 1957 [2021-07-09 17:30:29,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-07-09 17:30:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1714. [2021-07-09 17:30:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.0758902510215997) internal successors, (5269), 1713 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5269 transitions. [2021-07-09 17:30:29,099 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5269 transitions. Word has length 20 [2021-07-09 17:30:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,099 INFO L482 AbstractCegarLoop]: Abstraction has 1714 states and 5269 transitions. [2021-07-09 17:30:29,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5269 transitions. [2021-07-09 17:30:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:29,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,101 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38707,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,301 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 290 times [2021-07-09 17:30:29,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375760498] [2021-07-09 17:30:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375760498] [2021-07-09 17:30:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375760498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553966945] [2021-07-09 17:30:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:29,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:29,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553966945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:29,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257479518] [2021-07-09 17:30:29,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:29,430 INFO L87 Difference]: Start difference. First operand 1714 states and 5269 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,658 INFO L93 Difference]: Finished difference Result 2009 states and 5887 transitions. [2021-07-09 17:30:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,661 INFO L225 Difference]: With dead ends: 2009 [2021-07-09 17:30:29,661 INFO L226 Difference]: Without dead ends: 2009 [2021-07-09 17:30:29,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:30:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-07-09 17:30:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1728. [2021-07-09 17:30:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.0752750434279097) internal successors, (5311), 1727 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5311 transitions. [2021-07-09 17:30:29,682 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5311 transitions. Word has length 20 [2021-07-09 17:30:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,682 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5311 transitions. [2021-07-09 17:30:29,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5311 transitions. [2021-07-09 17:30:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:29,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,684 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38708,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,885 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 291 times [2021-07-09 17:30:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110605659] [2021-07-09 17:30:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110605659] [2021-07-09 17:30:29,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110605659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309809113] [2021-07-09 17:30:29,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:30,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,368 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:30,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:30,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:32,892 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 338 [2021-07-09 17:30:33,178 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 779 DAG size of output: 474 [2021-07-09 17:30:33,627 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 524 [2021-07-09 17:30:34,091 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-07-09 17:30:34,576 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-07-09 17:30:35,098 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 580 [2021-07-09 17:30:35,728 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 697 [2021-07-09 17:30:36,064 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 342 [2021-07-09 17:30:36,975 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 493 [2021-07-09 17:30:37,224 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 440 [2021-07-09 17:30:37,745 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 363 [2021-07-09 17:30:38,078 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 431 [2021-07-09 17:30:38,300 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 443 [2021-07-09 17:30:38,554 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 498 [2021-07-09 17:30:38,889 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-07-09 17:30:39,200 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-07-09 17:30:39,536 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 496 [2021-07-09 17:30:39,759 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 340 [2021-07-09 17:30:40,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309809113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203114907] [2021-07-09 17:30:40,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:40,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:40,409 INFO L87 Difference]: Start difference. First operand 1728 states and 5311 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:40,885 INFO L93 Difference]: Finished difference Result 1933 states and 5906 transitions. [2021-07-09 17:30:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:40,888 INFO L225 Difference]: With dead ends: 1933 [2021-07-09 17:30:40,888 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:30:40,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:30:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1883. [2021-07-09 17:30:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-07-09 17:30:40,910 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-07-09 17:30:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:40,910 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-07-09 17:30:40,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-07-09 17:30:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:40,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:40,912 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:41,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38709 [2021-07-09 17:30:41,113 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 292 times [2021-07-09 17:30:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:41,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381548119] [2021-07-09 17:30:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381548119] [2021-07-09 17:30:41,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381548119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929571041] [2021-07-09 17:30:41,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:30:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:41,580 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:41,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:42,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:30:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929571041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:42,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:30:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78675270] [2021-07-09 17:30:42,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:30:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:30:42,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:42,507 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:42,953 INFO L93 Difference]: Finished difference Result 1955 states and 5932 transitions. [2021-07-09 17:30:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:30:42,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:42,956 INFO L225 Difference]: With dead ends: 1955 [2021-07-09 17:30:42,956 INFO L226 Difference]: Without dead ends: 1950 [2021-07-09 17:30:42,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:30:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-07-09 17:30:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1883. [2021-07-09 17:30:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-07-09 17:30:42,979 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-07-09 17:30:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:42,979 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-07-09 17:30:42,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-07-09 17:30:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:42,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:42,981 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:43,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39426,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,181 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 293 times [2021-07-09 17:30:43,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:43,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631501271] [2021-07-09 17:30:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:43,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631501271] [2021-07-09 17:30:43,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631501271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592533964] [2021-07-09 17:30:43,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592533964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649111876] [2021-07-09 17:30:43,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:43,288 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,384 INFO L93 Difference]: Finished difference Result 2214 states and 6381 transitions. [2021-07-09 17:30:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,388 INFO L225 Difference]: With dead ends: 2214 [2021-07-09 17:30:43,388 INFO L226 Difference]: Without dead ends: 2214 [2021-07-09 17:30:43,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-07-09 17:30:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1898. [2021-07-09 17:30:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.084343700579863) internal successors, (5851), 1897 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 5851 transitions. [2021-07-09 17:30:43,413 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 5851 transitions. Word has length 20 [2021-07-09 17:30:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:43,413 INFO L482 AbstractCegarLoop]: Abstraction has 1898 states and 5851 transitions. [2021-07-09 17:30:43,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 5851 transitions. [2021-07-09 17:30:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:43,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:43,415 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:43,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39600,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,615 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 294 times [2021-07-09 17:30:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:43,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979003730] [2021-07-09 17:30:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979003730] [2021-07-09 17:30:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979003730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550316614] [2021-07-09 17:30:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:43,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550316614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:43,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95616056] [2021-07-09 17:30:43,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:43,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:43,723 INFO L87 Difference]: Start difference. First operand 1898 states and 5851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,843 INFO L93 Difference]: Finished difference Result 2225 states and 6496 transitions. [2021-07-09 17:30:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,846 INFO L225 Difference]: With dead ends: 2225 [2021-07-09 17:30:43,846 INFO L226 Difference]: Without dead ends: 2225 [2021-07-09 17:30:43,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-07-09 17:30:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1963. [2021-07-09 17:30:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0866462793068297) internal successors, (6056), 1962 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6056 transitions. [2021-07-09 17:30:43,870 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6056 transitions. Word has length 20 [2021-07-09 17:30:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:43,870 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 6056 transitions. [2021-07-09 17:30:43,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6056 transitions. [2021-07-09 17:30:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:43,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:43,872 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39601 [2021-07-09 17:30:44,094 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 295 times [2021-07-09 17:30:44,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291462500] [2021-07-09 17:30:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291462500] [2021-07-09 17:30:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291462500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10900215] [2021-07-09 17:30:44,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10900215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:44,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697435926] [2021-07-09 17:30:44,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:44,208 INFO L87 Difference]: Start difference. First operand 1963 states and 6056 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,338 INFO L93 Difference]: Finished difference Result 2251 states and 6550 transitions. [2021-07-09 17:30:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,342 INFO L225 Difference]: With dead ends: 2251 [2021-07-09 17:30:44,342 INFO L226 Difference]: Without dead ends: 2251 [2021-07-09 17:30:44,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-07-09 17:30:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1967. [2021-07-09 17:30:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.084944048830112) internal successors, (6065), 1966 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6065 transitions. [2021-07-09 17:30:44,365 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6065 transitions. Word has length 20 [2021-07-09 17:30:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,365 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 6065 transitions. [2021-07-09 17:30:44,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6065 transitions. [2021-07-09 17:30:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:44,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,368 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39602 [2021-07-09 17:30:44,568 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 296 times [2021-07-09 17:30:44,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954990862] [2021-07-09 17:30:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:44,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954990862] [2021-07-09 17:30:44,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954990862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691709258] [2021-07-09 17:30:44,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:44,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691709258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:44,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473017322] [2021-07-09 17:30:44,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:44,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:44,683 INFO L87 Difference]: Start difference. First operand 1967 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,759 INFO L93 Difference]: Finished difference Result 2072 states and 6290 transitions. [2021-07-09 17:30:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:30:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,763 INFO L225 Difference]: With dead ends: 2072 [2021-07-09 17:30:44,763 INFO L226 Difference]: Without dead ends: 2072 [2021-07-09 17:30:44,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-07-09 17:30:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2004. [2021-07-09 17:30:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.0833749375936095) internal successors, (6176), 2003 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6176 transitions. [2021-07-09 17:30:44,786 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6176 transitions. Word has length 20 [2021-07-09 17:30:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,786 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6176 transitions. [2021-07-09 17:30:44,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6176 transitions. [2021-07-09 17:30:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:44,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,788 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39603 [2021-07-09 17:30:44,988 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 297 times [2021-07-09 17:30:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949488111] [2021-07-09 17:30:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949488111] [2021-07-09 17:30:45,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949488111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944868901] [2021-07-09 17:30:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:45,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944868901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:45,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163507010] [2021-07-09 17:30:45,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:45,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:45,118 INFO L87 Difference]: Start difference. First operand 2004 states and 6176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:45,260 INFO L93 Difference]: Finished difference Result 2124 states and 6392 transitions. [2021-07-09 17:30:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:45,263 INFO L225 Difference]: With dead ends: 2124 [2021-07-09 17:30:45,263 INFO L226 Difference]: Without dead ends: 2124 [2021-07-09 17:30:45,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-07-09 17:30:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2003. [2021-07-09 17:30:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.083416583416583) internal successors, (6173), 2002 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6173 transitions. [2021-07-09 17:30:45,286 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6173 transitions. Word has length 20 [2021-07-09 17:30:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,286 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6173 transitions. [2021-07-09 17:30:45,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6173 transitions. [2021-07-09 17:30:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:45,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,288 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:45,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39604 [2021-07-09 17:30:45,489 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 298 times [2021-07-09 17:30:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:45,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494492333] [2021-07-09 17:30:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494492333] [2021-07-09 17:30:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494492333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213078528] [2021-07-09 17:30:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213078528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766143268] [2021-07-09 17:30:45,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:45,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:45,614 INFO L87 Difference]: Start difference. First operand 2003 states and 6173 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:45,792 INFO L93 Difference]: Finished difference Result 2203 states and 6584 transitions. [2021-07-09 17:30:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:45,795 INFO L225 Difference]: With dead ends: 2203 [2021-07-09 17:30:45,795 INFO L226 Difference]: Without dead ends: 2203 [2021-07-09 17:30:45,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-07-09 17:30:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2015. [2021-07-09 17:30:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.08291956305859) internal successors, (6209), 2014 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6209 transitions. [2021-07-09 17:30:45,817 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6209 transitions. Word has length 20 [2021-07-09 17:30:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,818 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6209 transitions. [2021-07-09 17:30:45,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6209 transitions. [2021-07-09 17:30:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:30:45,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,820 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39605 [2021-07-09 17:30:46,020 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 299 times [2021-07-09 17:30:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762715760] [2021-07-09 17:30:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762715760] [2021-07-09 17:30:46,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762715760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548810296] [2021-07-09 17:30:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548810296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:46,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:46,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920775851] [2021-07-09 17:30:46,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:46,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:46,150 INFO L87 Difference]: Start difference. First operand 2015 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,353 INFO L93 Difference]: Finished difference Result 2375 states and 7049 transitions. [2021-07-09 17:30:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:30:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,372 INFO L225 Difference]: With dead ends: 2375 [2021-07-09 17:30:46,372 INFO L226 Difference]: Without dead ends: 2375 [2021-07-09 17:30:46,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-07-09 17:30:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2034. [2021-07-09 17:30:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.0821446138711264) internal successors, (6266), 2033 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6266 transitions. [2021-07-09 17:30:46,395 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6266 transitions. Word has length 20 [2021-07-09 17:30:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,395 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 6266 transitions. [2021-07-09 17:30:46,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6266 transitions. [2021-07-09 17:30:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:46,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,397 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39606,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,598 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 300 times [2021-07-09 17:30:46,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768164943] [2021-07-09 17:30:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768164943] [2021-07-09 17:30:46,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768164943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524451994] [2021-07-09 17:30:46,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524451994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:46,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:30:46,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694608112] [2021-07-09 17:30:46,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:46,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:46,742 INFO L87 Difference]: Start difference. First operand 2034 states and 6266 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,887 INFO L93 Difference]: Finished difference Result 2216 states and 6557 transitions. [2021-07-09 17:30:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,890 INFO L225 Difference]: With dead ends: 2216 [2021-07-09 17:30:46,890 INFO L226 Difference]: Without dead ends: 2212 [2021-07-09 17:30:46,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-09 17:30:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2020. [2021-07-09 17:30:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.0787518573551265) internal successors, (6216), 2019 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6216 transitions. [2021-07-09 17:30:46,915 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6216 transitions. Word has length 21 [2021-07-09 17:30:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,915 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 6216 transitions. [2021-07-09 17:30:46,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6216 transitions. [2021-07-09 17:30:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:46,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,917 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39607 [2021-07-09 17:30:47,117 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 301 times [2021-07-09 17:30:47,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264763501] [2021-07-09 17:30:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264763501] [2021-07-09 17:30:47,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264763501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911085151] [2021-07-09 17:30:47,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911085151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:30:47,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082172678] [2021-07-09 17:30:47,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:47,251 INFO L87 Difference]: Start difference. First operand 2020 states and 6216 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,488 INFO L93 Difference]: Finished difference Result 2358 states and 6864 transitions. [2021-07-09 17:30:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:30:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,491 INFO L225 Difference]: With dead ends: 2358 [2021-07-09 17:30:47,491 INFO L226 Difference]: Without dead ends: 2351 [2021-07-09 17:30:47,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-09 17:30:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1996. [2021-07-09 17:30:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0716791979949876) internal successors, (6128), 1995 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6128 transitions. [2021-07-09 17:30:47,518 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6128 transitions. Word has length 21 [2021-07-09 17:30:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:47,518 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6128 transitions. [2021-07-09 17:30:47,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6128 transitions. [2021-07-09 17:30:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:47,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:47,521 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39608 [2021-07-09 17:30:47,721 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 302 times [2021-07-09 17:30:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649936792] [2021-07-09 17:30:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649936792] [2021-07-09 17:30:47,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649936792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190070589] [2021-07-09 17:30:47,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:47,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190070589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:47,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:47,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571972011] [2021-07-09 17:30:47,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:47,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:47,839 INFO L87 Difference]: Start difference. First operand 1996 states and 6128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,995 INFO L93 Difference]: Finished difference Result 2055 states and 6217 transitions. [2021-07-09 17:30:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,998 INFO L225 Difference]: With dead ends: 2055 [2021-07-09 17:30:47,998 INFO L226 Difference]: Without dead ends: 2051 [2021-07-09 17:30:47,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-09 17:30:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1996. [2021-07-09 17:30:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.069674185463659) internal successors, (6124), 1995 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6124 transitions. [2021-07-09 17:30:48,022 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6124 transitions. Word has length 21 [2021-07-09 17:30:48,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:48,022 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6124 transitions. [2021-07-09 17:30:48,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6124 transitions. [2021-07-09 17:30:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:48,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:48,024 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39609,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,229 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 303 times [2021-07-09 17:30:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215453533] [2021-07-09 17:30:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215453533] [2021-07-09 17:30:48,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215453533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902095008] [2021-07-09 17:30:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902095008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408238145] [2021-07-09 17:30:48,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:48,356 INFO L87 Difference]: Start difference. First operand 1996 states and 6124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:48,432 INFO L93 Difference]: Finished difference Result 2326 states and 6716 transitions. [2021-07-09 17:30:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:48,435 INFO L225 Difference]: With dead ends: 2326 [2021-07-09 17:30:48,435 INFO L226 Difference]: Without dead ends: 2326 [2021-07-09 17:30:48,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-07-09 17:30:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1980. [2021-07-09 17:30:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.064679130874179) internal successors, (6065), 1979 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6065 transitions. [2021-07-09 17:30:48,468 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6065 transitions. Word has length 21 [2021-07-09 17:30:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:48,469 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6065 transitions. [2021-07-09 17:30:48,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6065 transitions. [2021-07-09 17:30:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:48,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:48,472 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39610 [2021-07-09 17:30:48,695 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 304 times [2021-07-09 17:30:48,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475300699] [2021-07-09 17:30:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475300699] [2021-07-09 17:30:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475300699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613692004] [2021-07-09 17:30:48,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613692004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122866054] [2021-07-09 17:30:48,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:48,846 INFO L87 Difference]: Start difference. First operand 1980 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:48,997 INFO L93 Difference]: Finished difference Result 2084 states and 6271 transitions. [2021-07-09 17:30:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,000 INFO L225 Difference]: With dead ends: 2084 [2021-07-09 17:30:49,000 INFO L226 Difference]: Without dead ends: 2076 [2021-07-09 17:30:49,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-07-09 17:30:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1988. [2021-07-09 17:30:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.06341217916457) internal successors, (6087), 1987 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 6087 transitions. [2021-07-09 17:30:49,027 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 6087 transitions. Word has length 21 [2021-07-09 17:30:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,027 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 6087 transitions. [2021-07-09 17:30:49,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 6087 transitions. [2021-07-09 17:30:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:49,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,029 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:49,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39611,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,230 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 305 times [2021-07-09 17:30:49,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:49,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040879744] [2021-07-09 17:30:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:49,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040879744] [2021-07-09 17:30:49,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040879744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277811] [2021-07-09 17:30:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:30:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:49,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:30:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940971225] [2021-07-09 17:30:49,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:49,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:49,350 INFO L87 Difference]: Start difference. First operand 1988 states and 6087 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,438 INFO L93 Difference]: Finished difference Result 2431 states and 6990 transitions. [2021-07-09 17:30:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,442 INFO L225 Difference]: With dead ends: 2431 [2021-07-09 17:30:49,442 INFO L226 Difference]: Without dead ends: 2431 [2021-07-09 17:30:49,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-07-09 17:30:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1991. [2021-07-09 17:30:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.063819095477387) internal successors, (6097), 1990 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6097 transitions. [2021-07-09 17:30:49,468 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6097 transitions. Word has length 21 [2021-07-09 17:30:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,468 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 6097 transitions. [2021-07-09 17:30:49,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6097 transitions. [2021-07-09 17:30:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:49,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,470 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:49,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39612 [2021-07-09 17:30:49,670 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 306 times [2021-07-09 17:30:49,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:49,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727343730] [2021-07-09 17:30:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:49,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727343730] [2021-07-09 17:30:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727343730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850161667] [2021-07-09 17:30:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850161667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:49,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268858119] [2021-07-09 17:30:49,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:49,788 INFO L87 Difference]: Start difference. First operand 1991 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,910 INFO L93 Difference]: Finished difference Result 2098 states and 6296 transitions. [2021-07-09 17:30:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,913 INFO L225 Difference]: With dead ends: 2098 [2021-07-09 17:30:49,913 INFO L226 Difference]: Without dead ends: 2086 [2021-07-09 17:30:49,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-09 17:30:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1993. [2021-07-09 17:30:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0607429718875503) internal successors, (6097), 1992 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6097 transitions. [2021-07-09 17:30:49,936 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6097 transitions. Word has length 21 [2021-07-09 17:30:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,937 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 6097 transitions. [2021-07-09 17:30:49,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6097 transitions. [2021-07-09 17:30:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:49,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,939 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39613 [2021-07-09 17:30:50,140 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 307 times [2021-07-09 17:30:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102811865] [2021-07-09 17:30:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102811865] [2021-07-09 17:30:50,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102811865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291666557] [2021-07-09 17:30:50,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291666557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:50,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492955415] [2021-07-09 17:30:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:50,256 INFO L87 Difference]: Start difference. First operand 1993 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,376 INFO L93 Difference]: Finished difference Result 2545 states and 7306 transitions. [2021-07-09 17:30:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,380 INFO L225 Difference]: With dead ends: 2545 [2021-07-09 17:30:50,380 INFO L226 Difference]: Without dead ends: 2545 [2021-07-09 17:30:50,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-07-09 17:30:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1996. [2021-07-09 17:30:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0606516290726815) internal successors, (6106), 1995 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6106 transitions. [2021-07-09 17:30:50,406 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6106 transitions. Word has length 21 [2021-07-09 17:30:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6106 transitions. [2021-07-09 17:30:50,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6106 transitions. [2021-07-09 17:30:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:50,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,409 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39614 [2021-07-09 17:30:50,609 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 308 times [2021-07-09 17:30:50,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972875057] [2021-07-09 17:30:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:50,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972875057] [2021-07-09 17:30:50,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972875057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166055508] [2021-07-09 17:30:50,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:50,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:50,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166055508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:50,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:50,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564850458] [2021-07-09 17:30:50,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:50,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:50,715 INFO L87 Difference]: Start difference. First operand 1996 states and 6106 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,787 INFO L93 Difference]: Finished difference Result 2246 states and 6593 transitions. [2021-07-09 17:30:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,790 INFO L225 Difference]: With dead ends: 2246 [2021-07-09 17:30:50,790 INFO L226 Difference]: Without dead ends: 2244 [2021-07-09 17:30:50,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-07-09 17:30:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2004. [2021-07-09 17:30:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.050424363454818) internal successors, (6110), 2003 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6110 transitions. [2021-07-09 17:30:50,816 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6110 transitions. Word has length 21 [2021-07-09 17:30:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,816 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6110 transitions. [2021-07-09 17:30:50,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6110 transitions. [2021-07-09 17:30:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:50,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,818 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39615 [2021-07-09 17:30:51,019 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 309 times [2021-07-09 17:30:51,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539486422] [2021-07-09 17:30:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:51,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539486422] [2021-07-09 17:30:51,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539486422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570149027] [2021-07-09 17:30:51,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570149027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:51,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588119180] [2021-07-09 17:30:51,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:51,119 INFO L87 Difference]: Start difference. First operand 2004 states and 6110 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,244 INFO L93 Difference]: Finished difference Result 2256 states and 6538 transitions. [2021-07-09 17:30:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,247 INFO L225 Difference]: With dead ends: 2256 [2021-07-09 17:30:51,247 INFO L226 Difference]: Without dead ends: 2254 [2021-07-09 17:30:51,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-09 17:30:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2016. [2021-07-09 17:30:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.04863523573201) internal successors, (6143), 2015 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6143 transitions. [2021-07-09 17:30:51,272 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6143 transitions. Word has length 21 [2021-07-09 17:30:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,272 INFO L482 AbstractCegarLoop]: Abstraction has 2016 states and 6143 transitions. [2021-07-09 17:30:51,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6143 transitions. [2021-07-09 17:30:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:51,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,274 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39616,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,475 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 310 times [2021-07-09 17:30:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057780857] [2021-07-09 17:30:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057780857] [2021-07-09 17:30:51,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057780857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510286579] [2021-07-09 17:30:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:51,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:51,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510286579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:51,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585817351] [2021-07-09 17:30:51,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:51,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:51,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:51,593 INFO L87 Difference]: Start difference. First operand 2016 states and 6143 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,678 INFO L93 Difference]: Finished difference Result 2369 states and 6830 transitions. [2021-07-09 17:30:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,681 INFO L225 Difference]: With dead ends: 2369 [2021-07-09 17:30:51,681 INFO L226 Difference]: Without dead ends: 2369 [2021-07-09 17:30:51,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-07-09 17:30:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2015. [2021-07-09 17:30:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.048162859980139) internal successors, (6139), 2014 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6139 transitions. [2021-07-09 17:30:51,708 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6139 transitions. Word has length 21 [2021-07-09 17:30:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6139 transitions. [2021-07-09 17:30:51,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6139 transitions. [2021-07-09 17:30:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:51,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,711 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39617 [2021-07-09 17:30:51,911 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 311 times [2021-07-09 17:30:51,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641280151] [2021-07-09 17:30:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641280151] [2021-07-09 17:30:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641280151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130609237] [2021-07-09 17:30:51,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:51,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130609237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:52,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104403847] [2021-07-09 17:30:52,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:52,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:52,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:52,027 INFO L87 Difference]: Start difference. First operand 2015 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,171 INFO L93 Difference]: Finished difference Result 2175 states and 6426 transitions. [2021-07-09 17:30:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:52,174 INFO L225 Difference]: With dead ends: 2175 [2021-07-09 17:30:52,174 INFO L226 Difference]: Without dead ends: 2157 [2021-07-09 17:30:52,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-07-09 17:30:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1987. [2021-07-09 17:30:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.0463242698892246) internal successors, (6050), 1986 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 6050 transitions. [2021-07-09 17:30:52,199 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 6050 transitions. Word has length 21 [2021-07-09 17:30:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:52,199 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 6050 transitions. [2021-07-09 17:30:52,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 6050 transitions. [2021-07-09 17:30:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:52,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:52,202 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:52,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39618 [2021-07-09 17:30:52,402 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 312 times [2021-07-09 17:30:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135401572] [2021-07-09 17:30:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135401572] [2021-07-09 17:30:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135401572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562949814] [2021-07-09 17:30:52,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562949814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:52,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285715442] [2021-07-09 17:30:52,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:52,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:52,532 INFO L87 Difference]: Start difference. First operand 1987 states and 6050 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,650 INFO L93 Difference]: Finished difference Result 2488 states and 7125 transitions. [2021-07-09 17:30:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:52,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:52,653 INFO L225 Difference]: With dead ends: 2488 [2021-07-09 17:30:52,653 INFO L226 Difference]: Without dead ends: 2488 [2021-07-09 17:30:52,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-07-09 17:30:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1994. [2021-07-09 17:30:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.046161565479177) internal successors, (6071), 1993 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6071 transitions. [2021-07-09 17:30:52,678 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6071 transitions. Word has length 21 [2021-07-09 17:30:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:52,678 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6071 transitions. [2021-07-09 17:30:52,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6071 transitions. [2021-07-09 17:30:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:52,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:52,680 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:52,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39619,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,881 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 313 times [2021-07-09 17:30:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:52,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013137504] [2021-07-09 17:30:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013137504] [2021-07-09 17:30:52,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013137504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91860377] [2021-07-09 17:30:52,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91860377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639054673] [2021-07-09 17:30:53,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:53,013 INFO L87 Difference]: Start difference. First operand 1994 states and 6071 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,142 INFO L93 Difference]: Finished difference Result 2166 states and 6392 transitions. [2021-07-09 17:30:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,145 INFO L225 Difference]: With dead ends: 2166 [2021-07-09 17:30:53,145 INFO L226 Difference]: Without dead ends: 2158 [2021-07-09 17:30:53,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-09 17:30:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2000. [2021-07-09 17:30:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.0400200100050023) internal successors, (6077), 1999 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6077 transitions. [2021-07-09 17:30:53,170 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6077 transitions. Word has length 21 [2021-07-09 17:30:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,170 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 6077 transitions. [2021-07-09 17:30:53,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6077 transitions. [2021-07-09 17:30:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:53,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,173 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39620,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,373 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 314 times [2021-07-09 17:30:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060013415] [2021-07-09 17:30:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060013415] [2021-07-09 17:30:53,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060013415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487876427] [2021-07-09 17:30:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487876427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:53,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357715903] [2021-07-09 17:30:53,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:53,499 INFO L87 Difference]: Start difference. First operand 2000 states and 6077 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,662 INFO L93 Difference]: Finished difference Result 2684 states and 7629 transitions. [2021-07-09 17:30:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,666 INFO L225 Difference]: With dead ends: 2684 [2021-07-09 17:30:53,666 INFO L226 Difference]: Without dead ends: 2684 [2021-07-09 17:30:53,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-07-09 17:30:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1877. [2021-07-09 17:30:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.031449893390192) internal successors, (5687), 1876 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5687 transitions. [2021-07-09 17:30:53,691 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5687 transitions. Word has length 21 [2021-07-09 17:30:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,691 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5687 transitions. [2021-07-09 17:30:53,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5687 transitions. [2021-07-09 17:30:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:53,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,694 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39621,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,894 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 315 times [2021-07-09 17:30:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765311273] [2021-07-09 17:30:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:53,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765311273] [2021-07-09 17:30:53,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765311273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872046279] [2021-07-09 17:30:53,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:53,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872046279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:53,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403119716] [2021-07-09 17:30:53,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:53,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:53,999 INFO L87 Difference]: Start difference. First operand 1877 states and 5687 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,059 INFO L93 Difference]: Finished difference Result 2128 states and 6179 transitions. [2021-07-09 17:30:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,061 INFO L225 Difference]: With dead ends: 2128 [2021-07-09 17:30:54,062 INFO L226 Difference]: Without dead ends: 2126 [2021-07-09 17:30:54,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-07-09 17:30:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1878. [2021-07-09 17:30:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0261054874800215) internal successors, (5680), 1877 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5680 transitions. [2021-07-09 17:30:54,084 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5680 transitions. Word has length 21 [2021-07-09 17:30:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,084 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5680 transitions. [2021-07-09 17:30:54,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5680 transitions. [2021-07-09 17:30:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:54,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,086 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39622,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,287 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 316 times [2021-07-09 17:30:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349745576] [2021-07-09 17:30:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:54,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349745576] [2021-07-09 17:30:54,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349745576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562528537] [2021-07-09 17:30:54,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:54,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:54,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562528537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119983059] [2021-07-09 17:30:54,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:54,405 INFO L87 Difference]: Start difference. First operand 1878 states and 5680 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,529 INFO L93 Difference]: Finished difference Result 2105 states and 6036 transitions. [2021-07-09 17:30:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:54,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,533 INFO L225 Difference]: With dead ends: 2105 [2021-07-09 17:30:54,533 INFO L226 Difference]: Without dead ends: 2103 [2021-07-09 17:30:54,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-07-09 17:30:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1878. [2021-07-09 17:30:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0218433670751197) internal successors, (5672), 1877 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5672 transitions. [2021-07-09 17:30:54,556 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5672 transitions. Word has length 21 [2021-07-09 17:30:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,556 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5672 transitions. [2021-07-09 17:30:54,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5672 transitions. [2021-07-09 17:30:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:54,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,558 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39623 [2021-07-09 17:30:54,758 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 317 times [2021-07-09 17:30:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837162887] [2021-07-09 17:30:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837162887] [2021-07-09 17:30:54,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837162887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107191342] [2021-07-09 17:30:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107191342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971409362] [2021-07-09 17:30:54,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:54,879 INFO L87 Difference]: Start difference. First operand 1878 states and 5672 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,023 INFO L93 Difference]: Finished difference Result 2035 states and 5959 transitions. [2021-07-09 17:30:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,025 INFO L225 Difference]: With dead ends: 2035 [2021-07-09 17:30:55,026 INFO L226 Difference]: Without dead ends: 2021 [2021-07-09 17:30:55,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-07-09 17:30:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1848. [2021-07-09 17:30:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.0211153221440172) internal successors, (5580), 1847 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5580 transitions. [2021-07-09 17:30:55,047 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5580 transitions. Word has length 21 [2021-07-09 17:30:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,047 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 5580 transitions. [2021-07-09 17:30:55,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5580 transitions. [2021-07-09 17:30:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:55,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,049 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:55,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39624 [2021-07-09 17:30:55,250 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 318 times [2021-07-09 17:30:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:55,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894774691] [2021-07-09 17:30:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:55,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894774691] [2021-07-09 17:30:55,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894774691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447652491] [2021-07-09 17:30:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:55,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447652491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:55,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801005907] [2021-07-09 17:30:55,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:55,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:55,363 INFO L87 Difference]: Start difference. First operand 1848 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,450 INFO L93 Difference]: Finished difference Result 2226 states and 6355 transitions. [2021-07-09 17:30:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,453 INFO L225 Difference]: With dead ends: 2226 [2021-07-09 17:30:55,453 INFO L226 Difference]: Without dead ends: 2226 [2021-07-09 17:30:55,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-07-09 17:30:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1837. [2021-07-09 17:30:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.017429193899782) internal successors, (5540), 1836 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5540 transitions. [2021-07-09 17:30:55,475 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5540 transitions. Word has length 21 [2021-07-09 17:30:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,475 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5540 transitions. [2021-07-09 17:30:55,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5540 transitions. [2021-07-09 17:30:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:55,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,477 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:55,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39625 [2021-07-09 17:30:55,678 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 319 times [2021-07-09 17:30:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:55,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111682057] [2021-07-09 17:30:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111682057] [2021-07-09 17:30:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111682057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612176143] [2021-07-09 17:30:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:55,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612176143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:55,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133324810] [2021-07-09 17:30:55,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:55,795 INFO L87 Difference]: Start difference. First operand 1837 states and 5540 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,952 INFO L93 Difference]: Finished difference Result 2036 states and 5912 transitions. [2021-07-09 17:30:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,955 INFO L225 Difference]: With dead ends: 2036 [2021-07-09 17:30:55,955 INFO L226 Difference]: Without dead ends: 2028 [2021-07-09 17:30:55,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-07-09 17:30:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1837. [2021-07-09 17:30:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.0152505446623095) internal successors, (5536), 1836 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5536 transitions. [2021-07-09 17:30:55,977 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5536 transitions. Word has length 21 [2021-07-09 17:30:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,977 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5536 transitions. [2021-07-09 17:30:55,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5536 transitions. [2021-07-09 17:30:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:55,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,979 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39626,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,180 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 320 times [2021-07-09 17:30:56,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89991052] [2021-07-09 17:30:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89991052] [2021-07-09 17:30:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89991052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135233320] [2021-07-09 17:30:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135233320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:56,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095984871] [2021-07-09 17:30:56,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:56,302 INFO L87 Difference]: Start difference. First operand 1837 states and 5536 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,444 INFO L93 Difference]: Finished difference Result 2364 states and 6697 transitions. [2021-07-09 17:30:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,447 INFO L225 Difference]: With dead ends: 2364 [2021-07-09 17:30:56,448 INFO L226 Difference]: Without dead ends: 2364 [2021-07-09 17:30:56,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-07-09 17:30:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1754. [2021-07-09 17:30:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.0119794637763833) internal successors, (5280), 1753 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5280 transitions. [2021-07-09 17:30:56,470 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5280 transitions. Word has length 21 [2021-07-09 17:30:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,470 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 5280 transitions. [2021-07-09 17:30:56,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5280 transitions. [2021-07-09 17:30:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:56,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,472 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39627 [2021-07-09 17:30:56,673 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 321 times [2021-07-09 17:30:56,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714946668] [2021-07-09 17:30:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714946668] [2021-07-09 17:30:56,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714946668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924398051] [2021-07-09 17:30:56,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924398051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:56,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085415437] [2021-07-09 17:30:56,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:56,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:56,798 INFO L87 Difference]: Start difference. First operand 1754 states and 5280 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,959 INFO L93 Difference]: Finished difference Result 2020 states and 5847 transitions. [2021-07-09 17:30:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,962 INFO L225 Difference]: With dead ends: 2020 [2021-07-09 17:30:56,962 INFO L226 Difference]: Without dead ends: 2010 [2021-07-09 17:30:56,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-07-09 17:30:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1756. [2021-07-09 17:30:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.0091168091168092) internal successors, (5281), 1755 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5281 transitions. [2021-07-09 17:30:56,983 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5281 transitions. Word has length 21 [2021-07-09 17:30:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,983 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5281 transitions. [2021-07-09 17:30:56,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5281 transitions. [2021-07-09 17:30:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:56,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,985 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39628,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,185 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 322 times [2021-07-09 17:30:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868048816] [2021-07-09 17:30:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868048816] [2021-07-09 17:30:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868048816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257252209] [2021-07-09 17:30:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:57,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257252209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:30:57,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751970294] [2021-07-09 17:30:57,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:57,317 INFO L87 Difference]: Start difference. First operand 1756 states and 5281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:57,516 INFO L93 Difference]: Finished difference Result 3174 states and 9068 transitions. [2021-07-09 17:30:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:57,521 INFO L225 Difference]: With dead ends: 3174 [2021-07-09 17:30:57,521 INFO L226 Difference]: Without dead ends: 3174 [2021-07-09 17:30:57,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-07-09 17:30:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1885. [2021-07-09 17:30:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.0031847133757963) internal successors, (5658), 1884 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5658 transitions. [2021-07-09 17:30:57,547 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5658 transitions. Word has length 21 [2021-07-09 17:30:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,547 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5658 transitions. [2021-07-09 17:30:57,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5658 transitions. [2021-07-09 17:30:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:57,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,549 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39629 [2021-07-09 17:30:57,750 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,750 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 323 times [2021-07-09 17:30:57,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268702585] [2021-07-09 17:30:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:57,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268702585] [2021-07-09 17:30:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268702585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295108258] [2021-07-09 17:30:57,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:57,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295108258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:57,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678122157] [2021-07-09 17:30:57,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:57,869 INFO L87 Difference]: Start difference. First operand 1885 states and 5658 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:57,931 INFO L93 Difference]: Finished difference Result 2149 states and 6166 transitions. [2021-07-09 17:30:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:57,934 INFO L225 Difference]: With dead ends: 2149 [2021-07-09 17:30:57,934 INFO L226 Difference]: Without dead ends: 2147 [2021-07-09 17:30:57,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-07-09 17:30:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1876. [2021-07-09 17:30:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9994666666666667) internal successors, (5624), 1875 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5624 transitions. [2021-07-09 17:30:57,955 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5624 transitions. Word has length 21 [2021-07-09 17:30:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,955 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5624 transitions. [2021-07-09 17:30:57,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5624 transitions. [2021-07-09 17:30:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:57,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,957 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39630,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,158 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,158 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 324 times [2021-07-09 17:30:58,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637455568] [2021-07-09 17:30:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:58,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637455568] [2021-07-09 17:30:58,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637455568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571889588] [2021-07-09 17:30:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:30:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:58,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571889588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:30:58,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89161221] [2021-07-09 17:30:58,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:58,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:58,259 INFO L87 Difference]: Start difference. First operand 1876 states and 5624 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,376 INFO L93 Difference]: Finished difference Result 2097 states and 6031 transitions. [2021-07-09 17:30:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,379 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 17:30:58,379 INFO L226 Difference]: Without dead ends: 2095 [2021-07-09 17:30:58,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-07-09 17:30:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1899. [2021-07-09 17:30:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.0010537407797684) internal successors, (5696), 1898 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5696 transitions. [2021-07-09 17:30:58,404 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5696 transitions. Word has length 21 [2021-07-09 17:30:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,404 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5696 transitions. [2021-07-09 17:30:58,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5696 transitions. [2021-07-09 17:30:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:58,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,406 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39631,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,607 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 325 times [2021-07-09 17:30:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017716820] [2021-07-09 17:30:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:58,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017716820] [2021-07-09 17:30:58,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017716820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692148024] [2021-07-09 17:30:58,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692148024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:58,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332643172] [2021-07-09 17:30:58,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:58,718 INFO L87 Difference]: Start difference. First operand 1899 states and 5696 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,871 INFO L93 Difference]: Finished difference Result 2154 states and 6140 transitions. [2021-07-09 17:30:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,874 INFO L225 Difference]: With dead ends: 2154 [2021-07-09 17:30:58,874 INFO L226 Difference]: Without dead ends: 2136 [2021-07-09 17:30:58,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-09 17:30:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1861. [2021-07-09 17:30:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.9935483870967743) internal successors, (5568), 1860 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 5568 transitions. [2021-07-09 17:30:58,895 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 5568 transitions. Word has length 21 [2021-07-09 17:30:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,896 INFO L482 AbstractCegarLoop]: Abstraction has 1861 states and 5568 transitions. [2021-07-09 17:30:58,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 5568 transitions. [2021-07-09 17:30:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:58,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,897 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39632,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,098 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 326 times [2021-07-09 17:30:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861431866] [2021-07-09 17:30:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861431866] [2021-07-09 17:30:59,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861431866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589508583] [2021-07-09 17:30:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589508583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:59,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448868071] [2021-07-09 17:30:59,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:59,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:59,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:59,216 INFO L87 Difference]: Start difference. First operand 1861 states and 5568 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,377 INFO L93 Difference]: Finished difference Result 2057 states and 5928 transitions. [2021-07-09 17:30:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,380 INFO L225 Difference]: With dead ends: 2057 [2021-07-09 17:30:59,380 INFO L226 Difference]: Without dead ends: 2041 [2021-07-09 17:30:59,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-09 17:30:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1865. [2021-07-09 17:30:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.984978540772532) internal successors, (5564), 1864 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5564 transitions. [2021-07-09 17:30:59,402 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5564 transitions. Word has length 21 [2021-07-09 17:30:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,402 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5564 transitions. [2021-07-09 17:30:59,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5564 transitions. [2021-07-09 17:30:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:59,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,404 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39633,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,605 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 327 times [2021-07-09 17:30:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091776955] [2021-07-09 17:30:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091776955] [2021-07-09 17:30:59,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091776955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419146435] [2021-07-09 17:30:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419146435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:59,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:59,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151981404] [2021-07-09 17:30:59,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:59,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:59,722 INFO L87 Difference]: Start difference. First operand 1865 states and 5564 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,835 INFO L93 Difference]: Finished difference Result 2235 states and 6339 transitions. [2021-07-09 17:30:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:30:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,838 INFO L225 Difference]: With dead ends: 2235 [2021-07-09 17:30:59,838 INFO L226 Difference]: Without dead ends: 2235 [2021-07-09 17:30:59,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-07-09 17:30:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1818. [2021-07-09 17:30:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.977435332966428) internal successors, (5410), 1817 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5410 transitions. [2021-07-09 17:30:59,861 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5410 transitions. Word has length 21 [2021-07-09 17:30:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,861 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5410 transitions. [2021-07-09 17:30:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5410 transitions. [2021-07-09 17:30:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:30:59,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,863 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39634,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,064 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 328 times [2021-07-09 17:31:00,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834375919] [2021-07-09 17:31:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834375919] [2021-07-09 17:31:00,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834375919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605434792] [2021-07-09 17:31:00,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605434792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044057790] [2021-07-09 17:31:00,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:00,190 INFO L87 Difference]: Start difference. First operand 1818 states and 5410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,320 INFO L93 Difference]: Finished difference Result 2108 states and 6025 transitions. [2021-07-09 17:31:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,323 INFO L225 Difference]: With dead ends: 2108 [2021-07-09 17:31:00,323 INFO L226 Difference]: Without dead ends: 2098 [2021-07-09 17:31:00,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-07-09 17:31:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1818. [2021-07-09 17:31:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.976884975233902) internal successors, (5409), 1817 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5409 transitions. [2021-07-09 17:31:00,344 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5409 transitions. Word has length 21 [2021-07-09 17:31:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,345 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5409 transitions. [2021-07-09 17:31:00,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5409 transitions. [2021-07-09 17:31:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:00,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,346 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-07-09 17:31:00,547 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 329 times [2021-07-09 17:31:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858384619] [2021-07-09 17:31:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858384619] [2021-07-09 17:31:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858384619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197636908] [2021-07-09 17:31:00,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:00,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197636908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547085100] [2021-07-09 17:31:00,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:00,667 INFO L87 Difference]: Start difference. First operand 1818 states and 5409 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,830 INFO L93 Difference]: Finished difference Result 3306 states and 9499 transitions. [2021-07-09 17:31:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,836 INFO L225 Difference]: With dead ends: 3306 [2021-07-09 17:31:00,836 INFO L226 Difference]: Without dead ends: 3306 [2021-07-09 17:31:00,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-07-09 17:31:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 1865. [2021-07-09 17:31:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.962982832618026) internal successors, (5523), 1864 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5523 transitions. [2021-07-09 17:31:00,875 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5523 transitions. Word has length 21 [2021-07-09 17:31:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,875 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5523 transitions. [2021-07-09 17:31:00,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5523 transitions. [2021-07-09 17:31:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:00,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,877 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:01,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39636 [2021-07-09 17:31:01,078 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 330 times [2021-07-09 17:31:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:01,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740725521] [2021-07-09 17:31:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:01,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740725521] [2021-07-09 17:31:01,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740725521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897123700] [2021-07-09 17:31:01,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:31:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897123700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:01,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488528943] [2021-07-09 17:31:01,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:01,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:01,202 INFO L87 Difference]: Start difference. First operand 1865 states and 5523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:01,313 INFO L93 Difference]: Finished difference Result 2163 states and 6155 transitions. [2021-07-09 17:31:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:01,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:01,316 INFO L225 Difference]: With dead ends: 2163 [2021-07-09 17:31:01,316 INFO L226 Difference]: Without dead ends: 2151 [2021-07-09 17:31:01,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-07-09 17:31:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1867. [2021-07-09 17:31:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9608788853161845) internal successors, (5525), 1866 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5525 transitions. [2021-07-09 17:31:01,338 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5525 transitions. Word has length 21 [2021-07-09 17:31:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:01,338 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5525 transitions. [2021-07-09 17:31:01,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5525 transitions. [2021-07-09 17:31:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:01,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:01,340 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:01,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39637 [2021-07-09 17:31:01,541 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 331 times [2021-07-09 17:31:01,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:01,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642024216] [2021-07-09 17:31:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:01,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642024216] [2021-07-09 17:31:01,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642024216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091710084] [2021-07-09 17:31:01,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091710084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883285499] [2021-07-09 17:31:01,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:01,662 INFO L87 Difference]: Start difference. First operand 1867 states and 5525 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:01,886 INFO L93 Difference]: Finished difference Result 3350 states and 9497 transitions. [2021-07-09 17:31:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:01,891 INFO L225 Difference]: With dead ends: 3350 [2021-07-09 17:31:01,891 INFO L226 Difference]: Without dead ends: 3350 [2021-07-09 17:31:01,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-07-09 17:31:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1964. [2021-07-09 17:31:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.957717778909832) internal successors, (5806), 1963 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 5806 transitions. [2021-07-09 17:31:01,920 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 5806 transitions. Word has length 21 [2021-07-09 17:31:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:01,920 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 5806 transitions. [2021-07-09 17:31:01,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 5806 transitions. [2021-07-09 17:31:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:01,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:01,922 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39638 [2021-07-09 17:31:02,122 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 332 times [2021-07-09 17:31:02,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466888289] [2021-07-09 17:31:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:02,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466888289] [2021-07-09 17:31:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466888289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927241973] [2021-07-09 17:31:02,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:02,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927241973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297072489] [2021-07-09 17:31:02,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:02,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:02,238 INFO L87 Difference]: Start difference. First operand 1964 states and 5806 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,332 INFO L93 Difference]: Finished difference Result 2106 states and 6084 transitions. [2021-07-09 17:31:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,335 INFO L225 Difference]: With dead ends: 2106 [2021-07-09 17:31:02,335 INFO L226 Difference]: Without dead ends: 2106 [2021-07-09 17:31:02,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-07-09 17:31:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1970. [2021-07-09 17:31:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.957846622651092) internal successors, (5824), 1969 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5824 transitions. [2021-07-09 17:31:02,356 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5824 transitions. Word has length 21 [2021-07-09 17:31:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,356 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5824 transitions. [2021-07-09 17:31:02,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5824 transitions. [2021-07-09 17:31:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:02,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,358 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39639 [2021-07-09 17:31:02,559 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 333 times [2021-07-09 17:31:02,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759268812] [2021-07-09 17:31:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:02,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759268812] [2021-07-09 17:31:02,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759268812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437002309] [2021-07-09 17:31:02,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437002309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538203704] [2021-07-09 17:31:02,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:02,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:02,664 INFO L87 Difference]: Start difference. First operand 1970 states and 5824 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,826 INFO L93 Difference]: Finished difference Result 2190 states and 6175 transitions. [2021-07-09 17:31:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,829 INFO L225 Difference]: With dead ends: 2190 [2021-07-09 17:31:02,829 INFO L226 Difference]: Without dead ends: 2186 [2021-07-09 17:31:02,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-07-09 17:31:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1970. [2021-07-09 17:31:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.95733875063484) internal successors, (5823), 1969 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5823 transitions. [2021-07-09 17:31:02,861 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5823 transitions. Word has length 21 [2021-07-09 17:31:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,861 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5823 transitions. [2021-07-09 17:31:02,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5823 transitions. [2021-07-09 17:31:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:02,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,864 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39640,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,074 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 334 times [2021-07-09 17:31:03,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778675636] [2021-07-09 17:31:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778675636] [2021-07-09 17:31:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778675636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662001787] [2021-07-09 17:31:03,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:03,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662001787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:03,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138077518] [2021-07-09 17:31:03,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:03,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:03,190 INFO L87 Difference]: Start difference. First operand 1970 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,300 INFO L93 Difference]: Finished difference Result 2213 states and 6351 transitions. [2021-07-09 17:31:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,303 INFO L225 Difference]: With dead ends: 2213 [2021-07-09 17:31:03,303 INFO L226 Difference]: Without dead ends: 2193 [2021-07-09 17:31:03,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-07-09 17:31:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1970. [2021-07-09 17:31:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.9563230066023363) internal successors, (5821), 1969 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5821 transitions. [2021-07-09 17:31:03,327 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5821 transitions. Word has length 21 [2021-07-09 17:31:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,327 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5821 transitions. [2021-07-09 17:31:03,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5821 transitions. [2021-07-09 17:31:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:03,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,329 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39641,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,530 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,530 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 335 times [2021-07-09 17:31:03,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799723326] [2021-07-09 17:31:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799723326] [2021-07-09 17:31:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799723326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586170143] [2021-07-09 17:31:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586170143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588648076] [2021-07-09 17:31:03,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:03,658 INFO L87 Difference]: Start difference. First operand 1970 states and 5821 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,848 INFO L93 Difference]: Finished difference Result 2787 states and 7905 transitions. [2021-07-09 17:31:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,851 INFO L225 Difference]: With dead ends: 2787 [2021-07-09 17:31:03,851 INFO L226 Difference]: Without dead ends: 2787 [2021-07-09 17:31:03,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-07-09 17:31:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2121. [2021-07-09 17:31:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9627358490566036) internal successors, (6281), 2120 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6281 transitions. [2021-07-09 17:31:03,880 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6281 transitions. Word has length 21 [2021-07-09 17:31:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,880 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6281 transitions. [2021-07-09 17:31:03,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6281 transitions. [2021-07-09 17:31:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:03,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,882 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39642,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,083 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,083 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 336 times [2021-07-09 17:31:04,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116722802] [2021-07-09 17:31:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116722802] [2021-07-09 17:31:04,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116722802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077044216] [2021-07-09 17:31:04,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077044216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:04,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:04,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619123849] [2021-07-09 17:31:04,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:04,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:04,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:04,201 INFO L87 Difference]: Start difference. First operand 2121 states and 6281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,356 INFO L93 Difference]: Finished difference Result 2439 states and 6992 transitions. [2021-07-09 17:31:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,359 INFO L225 Difference]: With dead ends: 2439 [2021-07-09 17:31:04,359 INFO L226 Difference]: Without dead ends: 2419 [2021-07-09 17:31:04,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-07-09 17:31:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2121. [2021-07-09 17:31:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9584905660377356) internal successors, (6272), 2120 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6272 transitions. [2021-07-09 17:31:04,385 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6272 transitions. Word has length 21 [2021-07-09 17:31:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,385 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6272 transitions. [2021-07-09 17:31:04,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6272 transitions. [2021-07-09 17:31:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:04,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,387 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39643 [2021-07-09 17:31:04,588 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 337 times [2021-07-09 17:31:04,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573294268] [2021-07-09 17:31:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573294268] [2021-07-09 17:31:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573294268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134137489] [2021-07-09 17:31:04,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134137489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726505710] [2021-07-09 17:31:04,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:04,707 INFO L87 Difference]: Start difference. First operand 2121 states and 6272 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,871 INFO L93 Difference]: Finished difference Result 2730 states and 7756 transitions. [2021-07-09 17:31:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,874 INFO L225 Difference]: With dead ends: 2730 [2021-07-09 17:31:04,874 INFO L226 Difference]: Without dead ends: 2730 [2021-07-09 17:31:04,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-07-09 17:31:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1965. [2021-07-09 17:31:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.969959266802444) internal successors, (5833), 1964 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 5833 transitions. [2021-07-09 17:31:04,901 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 5833 transitions. Word has length 21 [2021-07-09 17:31:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,901 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 5833 transitions. [2021-07-09 17:31:04,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 5833 transitions. [2021-07-09 17:31:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:04,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,903 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39644,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,103 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 338 times [2021-07-09 17:31:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496847904] [2021-07-09 17:31:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496847904] [2021-07-09 17:31:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496847904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885327493] [2021-07-09 17:31:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:05,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885327493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:05,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326027879] [2021-07-09 17:31:05,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:05,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:05,224 INFO L87 Difference]: Start difference. First operand 1965 states and 5833 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:05,330 INFO L93 Difference]: Finished difference Result 2345 states and 6666 transitions. [2021-07-09 17:31:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:05,334 INFO L225 Difference]: With dead ends: 2345 [2021-07-09 17:31:05,334 INFO L226 Difference]: Without dead ends: 2333 [2021-07-09 17:31:05,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-09 17:31:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1974. [2021-07-09 17:31:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.964521033958439) internal successors, (5849), 1973 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5849 transitions. [2021-07-09 17:31:05,358 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5849 transitions. Word has length 21 [2021-07-09 17:31:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:05,358 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 5849 transitions. [2021-07-09 17:31:05,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5849 transitions. [2021-07-09 17:31:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:05,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:05,361 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:05,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39645 [2021-07-09 17:31:05,561 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 339 times [2021-07-09 17:31:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775013200] [2021-07-09 17:31:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775013200] [2021-07-09 17:31:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775013200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182174396] [2021-07-09 17:31:05,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182174396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:05,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249587018] [2021-07-09 17:31:05,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:05,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:05,687 INFO L87 Difference]: Start difference. First operand 1974 states and 5849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:05,922 INFO L93 Difference]: Finished difference Result 3098 states and 8778 transitions. [2021-07-09 17:31:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:05,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:05,926 INFO L225 Difference]: With dead ends: 3098 [2021-07-09 17:31:05,926 INFO L226 Difference]: Without dead ends: 3098 [2021-07-09 17:31:05,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-07-09 17:31:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1904. [2021-07-09 17:31:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9600630583289544) internal successors, (5633), 1903 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5633 transitions. [2021-07-09 17:31:05,953 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5633 transitions. Word has length 21 [2021-07-09 17:31:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:05,953 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5633 transitions. [2021-07-09 17:31:05,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5633 transitions. [2021-07-09 17:31:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:05,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:05,955 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39646,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,155 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 340 times [2021-07-09 17:31:06,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078909120] [2021-07-09 17:31:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:06,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078909120] [2021-07-09 17:31:06,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078909120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923921354] [2021-07-09 17:31:06,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:06,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923921354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:31:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676910890] [2021-07-09 17:31:06,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:31:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:31:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:31:06,258 INFO L87 Difference]: Start difference. First operand 1904 states and 5633 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,327 INFO L93 Difference]: Finished difference Result 2228 states and 6256 transitions. [2021-07-09 17:31:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,330 INFO L225 Difference]: With dead ends: 2228 [2021-07-09 17:31:06,330 INFO L226 Difference]: Without dead ends: 2228 [2021-07-09 17:31:06,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-07-09 17:31:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1928. [2021-07-09 17:31:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9709392838609237) internal successors, (5725), 1927 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5725 transitions. [2021-07-09 17:31:06,352 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5725 transitions. Word has length 21 [2021-07-09 17:31:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,352 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 5725 transitions. [2021-07-09 17:31:06,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5725 transitions. [2021-07-09 17:31:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:06,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,354 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39647 [2021-07-09 17:31:06,554 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 341 times [2021-07-09 17:31:06,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556854082] [2021-07-09 17:31:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:06,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556854082] [2021-07-09 17:31:06,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556854082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139139499] [2021-07-09 17:31:06,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:06,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139139499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:31:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715965414] [2021-07-09 17:31:06,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:31:06,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:31:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:31:06,669 INFO L87 Difference]: Start difference. First operand 1928 states and 5725 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,789 INFO L93 Difference]: Finished difference Result 2105 states and 6019 transitions. [2021-07-09 17:31:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,792 INFO L225 Difference]: With dead ends: 2105 [2021-07-09 17:31:06,792 INFO L226 Difference]: Without dead ends: 2103 [2021-07-09 17:31:06,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-07-09 17:31:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1939. [2021-07-09 17:31:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9726522187822497) internal successors, (5761), 1938 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5761 transitions. [2021-07-09 17:31:06,815 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5761 transitions. Word has length 21 [2021-07-09 17:31:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,815 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5761 transitions. [2021-07-09 17:31:06,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5761 transitions. [2021-07-09 17:31:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:06,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,817 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39648 [2021-07-09 17:31:07,017 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 342 times [2021-07-09 17:31:07,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422447595] [2021-07-09 17:31:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:07,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422447595] [2021-07-09 17:31:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422447595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544399190] [2021-07-09 17:31:07,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:07,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544399190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:07,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326513385] [2021-07-09 17:31:07,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:07,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:07,148 INFO L87 Difference]: Start difference. First operand 1939 states and 5761 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,320 INFO L93 Difference]: Finished difference Result 2242 states and 6291 transitions. [2021-07-09 17:31:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:07,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,323 INFO L225 Difference]: With dead ends: 2242 [2021-07-09 17:31:07,323 INFO L226 Difference]: Without dead ends: 2212 [2021-07-09 17:31:07,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-09 17:31:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1939. [2021-07-09 17:31:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9623323013415894) internal successors, (5741), 1938 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5741 transitions. [2021-07-09 17:31:07,346 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5741 transitions. Word has length 21 [2021-07-09 17:31:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,346 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5741 transitions. [2021-07-09 17:31:07,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5741 transitions. [2021-07-09 17:31:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:07,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,348 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39649 [2021-07-09 17:31:07,548 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 343 times [2021-07-09 17:31:07,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025859380] [2021-07-09 17:31:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025859380] [2021-07-09 17:31:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025859380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100320010] [2021-07-09 17:31:07,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100320010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:07,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000298783] [2021-07-09 17:31:07,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:07,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:07,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:07,672 INFO L87 Difference]: Start difference. First operand 1939 states and 5741 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,855 INFO L93 Difference]: Finished difference Result 2170 states and 6162 transitions. [2021-07-09 17:31:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,858 INFO L225 Difference]: With dead ends: 2170 [2021-07-09 17:31:07,858 INFO L226 Difference]: Without dead ends: 2150 [2021-07-09 17:31:07,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-07-09 17:31:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1941. [2021-07-09 17:31:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.956701030927835) internal successors, (5736), 1940 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5736 transitions. [2021-07-09 17:31:07,880 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5736 transitions. Word has length 21 [2021-07-09 17:31:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,880 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5736 transitions. [2021-07-09 17:31:07,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5736 transitions. [2021-07-09 17:31:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:07,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,882 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39650,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,083 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 344 times [2021-07-09 17:31:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038491751] [2021-07-09 17:31:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038491751] [2021-07-09 17:31:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038491751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218240542] [2021-07-09 17:31:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:08,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218240542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:08,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038656936] [2021-07-09 17:31:08,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:08,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:08,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:08,219 INFO L87 Difference]: Start difference. First operand 1941 states and 5736 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,355 INFO L93 Difference]: Finished difference Result 2262 states and 6373 transitions. [2021-07-09 17:31:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,358 INFO L225 Difference]: With dead ends: 2262 [2021-07-09 17:31:08,358 INFO L226 Difference]: Without dead ends: 2262 [2021-07-09 17:31:08,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-09 17:31:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1442. [2021-07-09 17:31:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.8986814712005553) internal successors, (4177), 1441 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4177 transitions. [2021-07-09 17:31:08,377 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4177 transitions. Word has length 21 [2021-07-09 17:31:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,377 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4177 transitions. [2021-07-09 17:31:08,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4177 transitions. [2021-07-09 17:31:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:08,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,379 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39651,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,579 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 345 times [2021-07-09 17:31:08,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344378171] [2021-07-09 17:31:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344378171] [2021-07-09 17:31:08,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344378171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159951682] [2021-07-09 17:31:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:08,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159951682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:08,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879447757] [2021-07-09 17:31:08,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:08,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:08,712 INFO L87 Difference]: Start difference. First operand 1442 states and 4177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,831 INFO L93 Difference]: Finished difference Result 1911 states and 5213 transitions. [2021-07-09 17:31:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,834 INFO L225 Difference]: With dead ends: 1911 [2021-07-09 17:31:08,834 INFO L226 Difference]: Without dead ends: 1899 [2021-07-09 17:31:08,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-07-09 17:31:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1444. [2021-07-09 17:31:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.898128898128898) internal successors, (4182), 1443 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4182 transitions. [2021-07-09 17:31:08,850 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4182 transitions. Word has length 21 [2021-07-09 17:31:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,850 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4182 transitions. [2021-07-09 17:31:08,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4182 transitions. [2021-07-09 17:31:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:08,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,852 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39652,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,052 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 346 times [2021-07-09 17:31:09,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124066820] [2021-07-09 17:31:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124066820] [2021-07-09 17:31:09,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124066820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92460447] [2021-07-09 17:31:09,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:09,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92460447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468184389] [2021-07-09 17:31:09,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:09,194 INFO L87 Difference]: Start difference. First operand 1444 states and 4182 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:09,401 INFO L93 Difference]: Finished difference Result 2375 states and 6555 transitions. [2021-07-09 17:31:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:09,404 INFO L225 Difference]: With dead ends: 2375 [2021-07-09 17:31:09,404 INFO L226 Difference]: Without dead ends: 2375 [2021-07-09 17:31:09,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-07-09 17:31:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1721. [2021-07-09 17:31:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 2.9209302325581397) internal successors, (5024), 1720 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5024 transitions. [2021-07-09 17:31:09,426 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5024 transitions. Word has length 21 [2021-07-09 17:31:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,426 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5024 transitions. [2021-07-09 17:31:09,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5024 transitions. [2021-07-09 17:31:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:09,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,428 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39653,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,628 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 347 times [2021-07-09 17:31:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345158133] [2021-07-09 17:31:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345158133] [2021-07-09 17:31:09,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345158133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285974086] [2021-07-09 17:31:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:09,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285974086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:09,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479594701] [2021-07-09 17:31:09,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:09,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:09,764 INFO L87 Difference]: Start difference. First operand 1721 states and 5024 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:09,882 INFO L93 Difference]: Finished difference Result 2189 states and 6061 transitions. [2021-07-09 17:31:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:09,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:09,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:09,885 INFO L225 Difference]: With dead ends: 2189 [2021-07-09 17:31:09,885 INFO L226 Difference]: Without dead ends: 2175 [2021-07-09 17:31:09,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-07-09 17:31:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1736. [2021-07-09 17:31:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.9129682997118156) internal successors, (5054), 1735 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5054 transitions. [2021-07-09 17:31:09,905 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5054 transitions. Word has length 21 [2021-07-09 17:31:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,905 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5054 transitions. [2021-07-09 17:31:09,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5054 transitions. [2021-07-09 17:31:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:09,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,907 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39654,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,107 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 348 times [2021-07-09 17:31:10,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976101327] [2021-07-09 17:31:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976101327] [2021-07-09 17:31:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976101327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005643697] [2021-07-09 17:31:10,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:10,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005643697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:10,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977206581] [2021-07-09 17:31:10,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:10,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:10,244 INFO L87 Difference]: Start difference. First operand 1736 states and 5054 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,532 INFO L93 Difference]: Finished difference Result 2910 states and 8090 transitions. [2021-07-09 17:31:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:31:10,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,536 INFO L225 Difference]: With dead ends: 2910 [2021-07-09 17:31:10,536 INFO L226 Difference]: Without dead ends: 2910 [2021-07-09 17:31:10,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:31:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-07-09 17:31:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2068. [2021-07-09 17:31:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.9225931301403) internal successors, (6041), 2067 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 6041 transitions. [2021-07-09 17:31:10,564 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 6041 transitions. Word has length 21 [2021-07-09 17:31:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:10,564 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 6041 transitions. [2021-07-09 17:31:10,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 6041 transitions. [2021-07-09 17:31:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:10,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:10,566 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39655,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,767 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 349 times [2021-07-09 17:31:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143537051] [2021-07-09 17:31:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143537051] [2021-07-09 17:31:10,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143537051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147168541] [2021-07-09 17:31:10,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:10,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147168541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421084071] [2021-07-09 17:31:10,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:10,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:10,881 INFO L87 Difference]: Start difference. First operand 2068 states and 6041 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,974 INFO L93 Difference]: Finished difference Result 2357 states and 6621 transitions. [2021-07-09 17:31:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:10,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,977 INFO L225 Difference]: With dead ends: 2357 [2021-07-09 17:31:10,977 INFO L226 Difference]: Without dead ends: 2357 [2021-07-09 17:31:10,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-07-09 17:31:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2117. [2021-07-09 17:31:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9343100189035916) internal successors, (6209), 2116 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6209 transitions. [2021-07-09 17:31:11,003 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6209 transitions. Word has length 21 [2021-07-09 17:31:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,003 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6209 transitions. [2021-07-09 17:31:11,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6209 transitions. [2021-07-09 17:31:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:11,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,005 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39656 [2021-07-09 17:31:11,206 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 350 times [2021-07-09 17:31:11,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501375391] [2021-07-09 17:31:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501375391] [2021-07-09 17:31:11,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501375391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729801819] [2021-07-09 17:31:11,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:11,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729801819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:11,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:11,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917062019] [2021-07-09 17:31:11,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:11,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:11,321 INFO L87 Difference]: Start difference. First operand 2117 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,507 INFO L93 Difference]: Finished difference Result 2396 states and 6695 transitions. [2021-07-09 17:31:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,511 INFO L225 Difference]: With dead ends: 2396 [2021-07-09 17:31:11,511 INFO L226 Difference]: Without dead ends: 2392 [2021-07-09 17:31:11,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-07-09 17:31:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2136. [2021-07-09 17:31:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9400468384074943) internal successors, (6277), 2135 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6277 transitions. [2021-07-09 17:31:11,537 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6277 transitions. Word has length 21 [2021-07-09 17:31:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,537 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6277 transitions. [2021-07-09 17:31:11,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6277 transitions. [2021-07-09 17:31:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:11,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,539 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39657 [2021-07-09 17:31:11,740 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 351 times [2021-07-09 17:31:11,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22035943] [2021-07-09 17:31:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22035943] [2021-07-09 17:31:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22035943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888260149] [2021-07-09 17:31:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888260149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:11,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917158568] [2021-07-09 17:31:11,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:11,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:11,846 INFO L87 Difference]: Start difference. First operand 2136 states and 6277 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,970 INFO L93 Difference]: Finished difference Result 2333 states and 6617 transitions. [2021-07-09 17:31:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,973 INFO L225 Difference]: With dead ends: 2333 [2021-07-09 17:31:11,973 INFO L226 Difference]: Without dead ends: 2331 [2021-07-09 17:31:11,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-09 17:31:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2136. [2021-07-09 17:31:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9395784543325525) internal successors, (6276), 2135 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6276 transitions. [2021-07-09 17:31:12,000 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6276 transitions. Word has length 21 [2021-07-09 17:31:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,000 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6276 transitions. [2021-07-09 17:31:12,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6276 transitions. [2021-07-09 17:31:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:12,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,002 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39658,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,203 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 352 times [2021-07-09 17:31:12,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34425399] [2021-07-09 17:31:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34425399] [2021-07-09 17:31:12,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34425399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89931879] [2021-07-09 17:31:12,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:12,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89931879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:12,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288548516] [2021-07-09 17:31:12,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:12,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:12,311 INFO L87 Difference]: Start difference. First operand 2136 states and 6276 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:12,383 INFO L93 Difference]: Finished difference Result 2457 states and 6862 transitions. [2021-07-09 17:31:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:12,387 INFO L225 Difference]: With dead ends: 2457 [2021-07-09 17:31:12,387 INFO L226 Difference]: Without dead ends: 2457 [2021-07-09 17:31:12,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-09 17:31:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2126. [2021-07-09 17:31:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9345882352941177) internal successors, (6236), 2125 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6236 transitions. [2021-07-09 17:31:12,413 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6236 transitions. Word has length 21 [2021-07-09 17:31:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,413 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6236 transitions. [2021-07-09 17:31:12,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6236 transitions. [2021-07-09 17:31:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:12,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,415 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39659 [2021-07-09 17:31:12,616 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 353 times [2021-07-09 17:31:12,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253398759] [2021-07-09 17:31:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253398759] [2021-07-09 17:31:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253398759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798174339] [2021-07-09 17:31:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798174339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43091725] [2021-07-09 17:31:12,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:12,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:12,738 INFO L87 Difference]: Start difference. First operand 2126 states and 6236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:12,877 INFO L93 Difference]: Finished difference Result 2437 states and 6925 transitions. [2021-07-09 17:31:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:12,880 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 17:31:12,880 INFO L226 Difference]: Without dead ends: 2425 [2021-07-09 17:31:12,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-07-09 17:31:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2126. [2021-07-09 17:31:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9336470588235293) internal successors, (6234), 2125 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6234 transitions. [2021-07-09 17:31:12,905 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6234 transitions. Word has length 21 [2021-07-09 17:31:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,905 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6234 transitions. [2021-07-09 17:31:12,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6234 transitions. [2021-07-09 17:31:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:12,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,907 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39660,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,108 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 354 times [2021-07-09 17:31:13,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059369714] [2021-07-09 17:31:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059369714] [2021-07-09 17:31:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059369714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257945431] [2021-07-09 17:31:13,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257945431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:13,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986138924] [2021-07-09 17:31:13,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:13,230 INFO L87 Difference]: Start difference. First operand 2126 states and 6234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,449 INFO L93 Difference]: Finished difference Result 2763 states and 7759 transitions. [2021-07-09 17:31:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,452 INFO L225 Difference]: With dead ends: 2763 [2021-07-09 17:31:13,453 INFO L226 Difference]: Without dead ends: 2763 [2021-07-09 17:31:13,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-07-09 17:31:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2240. [2021-07-09 17:31:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.9383653416703885) internal successors, (6579), 2239 states have internal predecessors, (6579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6579 transitions. [2021-07-09 17:31:13,483 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6579 transitions. Word has length 21 [2021-07-09 17:31:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,483 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6579 transitions. [2021-07-09 17:31:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6579 transitions. [2021-07-09 17:31:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:13,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,485 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39661,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,686 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 355 times [2021-07-09 17:31:13,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857596989] [2021-07-09 17:31:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857596989] [2021-07-09 17:31:13,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857596989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131643995] [2021-07-09 17:31:13,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131643995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:13,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890545781] [2021-07-09 17:31:13,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:13,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:13,813 INFO L87 Difference]: Start difference. First operand 2240 states and 6579 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,987 INFO L93 Difference]: Finished difference Result 2620 states and 7456 transitions. [2021-07-09 17:31:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,991 INFO L225 Difference]: With dead ends: 2620 [2021-07-09 17:31:13,991 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 17:31:13,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 17:31:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2240. [2021-07-09 17:31:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.935685573916927) internal successors, (6573), 2239 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6573 transitions. [2021-07-09 17:31:14,019 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6573 transitions. Word has length 21 [2021-07-09 17:31:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,019 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6573 transitions. [2021-07-09 17:31:14,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6573 transitions. [2021-07-09 17:31:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:14,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,021 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:14,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39662 [2021-07-09 17:31:14,222 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:14,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 356 times [2021-07-09 17:31:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:14,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241952846] [2021-07-09 17:31:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241952846] [2021-07-09 17:31:14,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241952846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375453022] [2021-07-09 17:31:14,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:14,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375453022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:14,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228562245] [2021-07-09 17:31:14,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:14,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:14,351 INFO L87 Difference]: Start difference. First operand 2240 states and 6573 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:14,560 INFO L93 Difference]: Finished difference Result 2711 states and 7663 transitions. [2021-07-09 17:31:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:14,565 INFO L225 Difference]: With dead ends: 2711 [2021-07-09 17:31:14,565 INFO L226 Difference]: Without dead ends: 2711 [2021-07-09 17:31:14,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-07-09 17:31:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1587. [2021-07-09 17:31:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.91109709962169) internal successors, (4617), 1586 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4617 transitions. [2021-07-09 17:31:14,600 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4617 transitions. Word has length 21 [2021-07-09 17:31:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,600 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4617 transitions. [2021-07-09 17:31:14,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4617 transitions. [2021-07-09 17:31:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:14,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,602 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:14,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39663,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,803 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 357 times [2021-07-09 17:31:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:14,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668269710] [2021-07-09 17:31:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668269710] [2021-07-09 17:31:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668269710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817825868] [2021-07-09 17:31:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817825868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:14,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771945053] [2021-07-09 17:31:14,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:14,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:14,935 INFO L87 Difference]: Start difference. First operand 1587 states and 4617 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:15,041 INFO L93 Difference]: Finished difference Result 2083 states and 5732 transitions. [2021-07-09 17:31:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:15,044 INFO L225 Difference]: With dead ends: 2083 [2021-07-09 17:31:15,044 INFO L226 Difference]: Without dead ends: 2069 [2021-07-09 17:31:15,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-07-09 17:31:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1608. [2021-07-09 17:31:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.8985687616677036) internal successors, (4658), 1607 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4658 transitions. [2021-07-09 17:31:15,064 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4658 transitions. Word has length 21 [2021-07-09 17:31:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:15,064 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4658 transitions. [2021-07-09 17:31:15,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4658 transitions. [2021-07-09 17:31:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:15,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:15,066 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:15,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39664,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,266 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 358 times [2021-07-09 17:31:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:15,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685690551] [2021-07-09 17:31:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685690551] [2021-07-09 17:31:15,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685690551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427412136] [2021-07-09 17:31:15,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:15,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427412136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:15,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727758035] [2021-07-09 17:31:15,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:15,397 INFO L87 Difference]: Start difference. First operand 1608 states and 4658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:15,669 INFO L93 Difference]: Finished difference Result 2373 states and 6517 transitions. [2021-07-09 17:31:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:31:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:15,672 INFO L225 Difference]: With dead ends: 2373 [2021-07-09 17:31:15,672 INFO L226 Difference]: Without dead ends: 2373 [2021-07-09 17:31:15,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:31:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-07-09 17:31:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1546. [2021-07-09 17:31:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.8944983818770225) internal successors, (4472), 1545 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4472 transitions. [2021-07-09 17:31:15,693 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4472 transitions. Word has length 21 [2021-07-09 17:31:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:15,693 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 4472 transitions. [2021-07-09 17:31:15,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4472 transitions. [2021-07-09 17:31:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:15,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:15,695 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:15,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39665,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,895 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 359 times [2021-07-09 17:31:15,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:15,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447848084] [2021-07-09 17:31:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447848084] [2021-07-09 17:31:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447848084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489584528] [2021-07-09 17:31:15,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:15,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489584528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:16,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096173999] [2021-07-09 17:31:16,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:16,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:16,004 INFO L87 Difference]: Start difference. First operand 1546 states and 4472 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,082 INFO L93 Difference]: Finished difference Result 2113 states and 5765 transitions. [2021-07-09 17:31:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:16,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,085 INFO L225 Difference]: With dead ends: 2113 [2021-07-09 17:31:16,085 INFO L226 Difference]: Without dead ends: 2113 [2021-07-09 17:31:16,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-07-09 17:31:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1736. [2021-07-09 17:31:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.936023054755043) internal successors, (5094), 1735 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5094 transitions. [2021-07-09 17:31:16,105 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5094 transitions. Word has length 21 [2021-07-09 17:31:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,105 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5094 transitions. [2021-07-09 17:31:16,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5094 transitions. [2021-07-09 17:31:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:16,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,107 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,308 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 360 times [2021-07-09 17:31:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425096343] [2021-07-09 17:31:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425096343] [2021-07-09 17:31:16,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425096343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82019843] [2021-07-09 17:31:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:16,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:16,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82019843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:16,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834525035] [2021-07-09 17:31:16,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:16,409 INFO L87 Difference]: Start difference. First operand 1736 states and 5094 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,549 INFO L93 Difference]: Finished difference Result 1970 states and 5495 transitions. [2021-07-09 17:31:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,552 INFO L225 Difference]: With dead ends: 1970 [2021-07-09 17:31:16,552 INFO L226 Difference]: Without dead ends: 1968 [2021-07-09 17:31:16,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-07-09 17:31:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1755. [2021-07-09 17:31:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.944127708095781) internal successors, (5164), 1754 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5164 transitions. [2021-07-09 17:31:16,572 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5164 transitions. Word has length 21 [2021-07-09 17:31:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,572 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5164 transitions. [2021-07-09 17:31:16,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5164 transitions. [2021-07-09 17:31:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:16,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,574 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39667,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,774 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 361 times [2021-07-09 17:31:16,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768207809] [2021-07-09 17:31:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768207809] [2021-07-09 17:31:16,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768207809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790963488] [2021-07-09 17:31:16,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:16,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790963488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628964851] [2021-07-09 17:31:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:16,876 INFO L87 Difference]: Start difference. First operand 1755 states and 5164 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,013 INFO L93 Difference]: Finished difference Result 2106 states and 5785 transitions. [2021-07-09 17:31:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,016 INFO L225 Difference]: With dead ends: 2106 [2021-07-09 17:31:17,016 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 17:31:17,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 17:31:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1755. [2021-07-09 17:31:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.943557582668187) internal successors, (5163), 1754 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5163 transitions. [2021-07-09 17:31:17,037 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5163 transitions. Word has length 21 [2021-07-09 17:31:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,037 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5163 transitions. [2021-07-09 17:31:17,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5163 transitions. [2021-07-09 17:31:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:17,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,039 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39668 [2021-07-09 17:31:17,239 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 362 times [2021-07-09 17:31:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917264672] [2021-07-09 17:31:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917264672] [2021-07-09 17:31:17,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917264672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413646564] [2021-07-09 17:31:17,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:17,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413646564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:31:17,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588019774] [2021-07-09 17:31:17,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:17,344 INFO L87 Difference]: Start difference. First operand 1755 states and 5163 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,433 INFO L93 Difference]: Finished difference Result 2027 states and 5646 transitions. [2021-07-09 17:31:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:17,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,436 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 17:31:17,436 INFO L226 Difference]: Without dead ends: 2027 [2021-07-09 17:31:17,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-09 17:31:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1735. [2021-07-09 17:31:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.9371395617070357) internal successors, (5093), 1734 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5093 transitions. [2021-07-09 17:31:17,457 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5093 transitions. Word has length 21 [2021-07-09 17:31:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,457 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5093 transitions. [2021-07-09 17:31:17,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5093 transitions. [2021-07-09 17:31:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:17,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,459 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39669 [2021-07-09 17:31:17,660 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 363 times [2021-07-09 17:31:17,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097874050] [2021-07-09 17:31:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097874050] [2021-07-09 17:31:17,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097874050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3654965] [2021-07-09 17:31:17,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:17,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3654965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097405442] [2021-07-09 17:31:17,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:17,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:17,777 INFO L87 Difference]: Start difference. First operand 1735 states and 5093 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,920 INFO L93 Difference]: Finished difference Result 2088 states and 5771 transitions. [2021-07-09 17:31:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,923 INFO L225 Difference]: With dead ends: 2088 [2021-07-09 17:31:17,923 INFO L226 Difference]: Without dead ends: 2078 [2021-07-09 17:31:17,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-07-09 17:31:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1761. [2021-07-09 17:31:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.947159090909091) internal successors, (5187), 1760 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5187 transitions. [2021-07-09 17:31:17,945 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5187 transitions. Word has length 21 [2021-07-09 17:31:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,945 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 5187 transitions. [2021-07-09 17:31:17,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5187 transitions. [2021-07-09 17:31:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:17,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,947 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39670,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,147 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 364 times [2021-07-09 17:31:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001097462] [2021-07-09 17:31:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001097462] [2021-07-09 17:31:18,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001097462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766121893] [2021-07-09 17:31:18,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766121893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:18,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561936591] [2021-07-09 17:31:18,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:18,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:18,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:18,266 INFO L87 Difference]: Start difference. First operand 1761 states and 5187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,440 INFO L93 Difference]: Finished difference Result 2110 states and 5814 transitions. [2021-07-09 17:31:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,443 INFO L225 Difference]: With dead ends: 2110 [2021-07-09 17:31:18,443 INFO L226 Difference]: Without dead ends: 2102 [2021-07-09 17:31:18,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-07-09 17:31:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1765. [2021-07-09 17:31:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.945011337868481) internal successors, (5195), 1764 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5195 transitions. [2021-07-09 17:31:18,464 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5195 transitions. Word has length 21 [2021-07-09 17:31:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,464 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5195 transitions. [2021-07-09 17:31:18,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5195 transitions. [2021-07-09 17:31:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:18,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,466 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39671 [2021-07-09 17:31:18,667 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 365 times [2021-07-09 17:31:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24973054] [2021-07-09 17:31:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24973054] [2021-07-09 17:31:18,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24973054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009697930] [2021-07-09 17:31:18,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009697930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955625235] [2021-07-09 17:31:18,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:18,833 INFO L87 Difference]: Start difference. First operand 1765 states and 5195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,954 INFO L93 Difference]: Finished difference Result 2026 states and 5698 transitions. [2021-07-09 17:31:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,957 INFO L225 Difference]: With dead ends: 2026 [2021-07-09 17:31:18,957 INFO L226 Difference]: Without dead ends: 2026 [2021-07-09 17:31:18,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-07-09 17:31:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1701. [2021-07-09 17:31:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.9376470588235293) internal successors, (4994), 1700 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4994 transitions. [2021-07-09 17:31:18,978 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4994 transitions. Word has length 21 [2021-07-09 17:31:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,978 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4994 transitions. [2021-07-09 17:31:18,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4994 transitions. [2021-07-09 17:31:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:18,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,980 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:19,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39672 [2021-07-09 17:31:19,181 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 366 times [2021-07-09 17:31:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724910027] [2021-07-09 17:31:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:19,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724910027] [2021-07-09 17:31:19,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724910027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938056389] [2021-07-09 17:31:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:19,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938056389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:19,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148192175] [2021-07-09 17:31:19,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:19,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:19,302 INFO L87 Difference]: Start difference. First operand 1701 states and 4994 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:19,453 INFO L93 Difference]: Finished difference Result 2422 states and 6653 transitions. [2021-07-09 17:31:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:19,457 INFO L225 Difference]: With dead ends: 2422 [2021-07-09 17:31:19,457 INFO L226 Difference]: Without dead ends: 2402 [2021-07-09 17:31:19,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-07-09 17:31:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1701. [2021-07-09 17:31:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.934705882352941) internal successors, (4989), 1700 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4989 transitions. [2021-07-09 17:31:19,480 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4989 transitions. Word has length 21 [2021-07-09 17:31:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:19,480 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4989 transitions. [2021-07-09 17:31:19,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4989 transitions. [2021-07-09 17:31:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:19,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:19,482 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39673,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,683 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 367 times [2021-07-09 17:31:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973522566] [2021-07-09 17:31:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:19,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973522566] [2021-07-09 17:31:19,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973522566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635064398] [2021-07-09 17:31:19,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635064398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680302944] [2021-07-09 17:31:19,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:19,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:19,804 INFO L87 Difference]: Start difference. First operand 1701 states and 4989 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:19,890 INFO L93 Difference]: Finished difference Result 2175 states and 6221 transitions. [2021-07-09 17:31:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:19,893 INFO L225 Difference]: With dead ends: 2175 [2021-07-09 17:31:19,893 INFO L226 Difference]: Without dead ends: 2175 [2021-07-09 17:31:19,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-07-09 17:31:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2028. [2021-07-09 17:31:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.938332511100148) internal successors, (5956), 2027 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5956 transitions. [2021-07-09 17:31:19,916 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5956 transitions. Word has length 21 [2021-07-09 17:31:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:19,916 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5956 transitions. [2021-07-09 17:31:19,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5956 transitions. [2021-07-09 17:31:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:19,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:19,918 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39674,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,119 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 368 times [2021-07-09 17:31:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421162461] [2021-07-09 17:31:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:20,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421162461] [2021-07-09 17:31:20,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421162461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423790348] [2021-07-09 17:31:20,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423790348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:20,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:20,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215657742] [2021-07-09 17:31:20,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:20,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:20,251 INFO L87 Difference]: Start difference. First operand 2028 states and 5956 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,407 INFO L93 Difference]: Finished difference Result 2740 states and 7631 transitions. [2021-07-09 17:31:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:20,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,411 INFO L225 Difference]: With dead ends: 2740 [2021-07-09 17:31:20,411 INFO L226 Difference]: Without dead ends: 2728 [2021-07-09 17:31:20,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-07-09 17:31:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2062. [2021-07-09 17:31:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.937894226103833) internal successors, (6055), 2061 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6055 transitions. [2021-07-09 17:31:20,454 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6055 transitions. Word has length 21 [2021-07-09 17:31:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,454 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 6055 transitions. [2021-07-09 17:31:20,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6055 transitions. [2021-07-09 17:31:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:20,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,457 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39675,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,680 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 369 times [2021-07-09 17:31:20,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858444452] [2021-07-09 17:31:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:20,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858444452] [2021-07-09 17:31:20,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858444452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729533817] [2021-07-09 17:31:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729533817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:20,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:20,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885762244] [2021-07-09 17:31:20,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:20,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:20,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:20,808 INFO L87 Difference]: Start difference. First operand 2062 states and 6055 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,962 INFO L93 Difference]: Finished difference Result 2298 states and 6476 transitions. [2021-07-09 17:31:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,965 INFO L225 Difference]: With dead ends: 2298 [2021-07-09 17:31:20,965 INFO L226 Difference]: Without dead ends: 2298 [2021-07-09 17:31:20,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-09 17:31:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2031. [2021-07-09 17:31:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9369458128078816) internal successors, (5962), 2030 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5962 transitions. [2021-07-09 17:31:20,989 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5962 transitions. Word has length 21 [2021-07-09 17:31:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,989 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5962 transitions. [2021-07-09 17:31:20,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5962 transitions. [2021-07-09 17:31:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:20,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,991 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39676,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,191 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 370 times [2021-07-09 17:31:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201664233] [2021-07-09 17:31:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201664233] [2021-07-09 17:31:21,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201664233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340167253] [2021-07-09 17:31:21,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340167253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163439633] [2021-07-09 17:31:21,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:21,323 INFO L87 Difference]: Start difference. First operand 2031 states and 5962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:21,411 INFO L93 Difference]: Finished difference Result 2345 states and 6662 transitions. [2021-07-09 17:31:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:21,414 INFO L225 Difference]: With dead ends: 2345 [2021-07-09 17:31:21,414 INFO L226 Difference]: Without dead ends: 2331 [2021-07-09 17:31:21,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-09 17:31:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2031. [2021-07-09 17:31:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9364532019704432) internal successors, (5961), 2030 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5961 transitions. [2021-07-09 17:31:21,438 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5961 transitions. Word has length 21 [2021-07-09 17:31:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,438 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5961 transitions. [2021-07-09 17:31:21,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5961 transitions. [2021-07-09 17:31:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:21,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,440 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39677,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,653 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 371 times [2021-07-09 17:31:21,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101209816] [2021-07-09 17:31:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101209816] [2021-07-09 17:31:21,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101209816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31770770] [2021-07-09 17:31:21,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:21,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31770770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116394083] [2021-07-09 17:31:21,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:21,786 INFO L87 Difference]: Start difference. First operand 2031 states and 5961 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,004 INFO L93 Difference]: Finished difference Result 2359 states and 6653 transitions. [2021-07-09 17:31:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:22,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,007 INFO L225 Difference]: With dead ends: 2359 [2021-07-09 17:31:22,007 INFO L226 Difference]: Without dead ends: 2359 [2021-07-09 17:31:22,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-09 17:31:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2104. [2021-07-09 17:31:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9381835473133617) internal successors, (6179), 2103 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6179 transitions. [2021-07-09 17:31:22,031 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6179 transitions. Word has length 21 [2021-07-09 17:31:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,031 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6179 transitions. [2021-07-09 17:31:22,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6179 transitions. [2021-07-09 17:31:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:22,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,034 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39678 [2021-07-09 17:31:22,235 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 372 times [2021-07-09 17:31:22,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876411259] [2021-07-09 17:31:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876411259] [2021-07-09 17:31:22,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876411259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240700131] [2021-07-09 17:31:22,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:31:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240700131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:22,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:22,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22790957] [2021-07-09 17:31:22,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:22,387 INFO L87 Difference]: Start difference. First operand 2104 states and 6179 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,467 INFO L93 Difference]: Finished difference Result 2399 states and 6834 transitions. [2021-07-09 17:31:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,472 INFO L225 Difference]: With dead ends: 2399 [2021-07-09 17:31:22,472 INFO L226 Difference]: Without dead ends: 2383 [2021-07-09 17:31:22,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-07-09 17:31:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2104. [2021-07-09 17:31:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9377080361388495) internal successors, (6178), 2103 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6178 transitions. [2021-07-09 17:31:22,500 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6178 transitions. Word has length 21 [2021-07-09 17:31:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,500 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6178 transitions. [2021-07-09 17:31:22,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6178 transitions. [2021-07-09 17:31:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:22,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,503 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39679 [2021-07-09 17:31:22,713 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 373 times [2021-07-09 17:31:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224081680] [2021-07-09 17:31:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224081680] [2021-07-09 17:31:22,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224081680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9119725] [2021-07-09 17:31:22,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9119725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:22,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:22,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90375396] [2021-07-09 17:31:22,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:22,849 INFO L87 Difference]: Start difference. First operand 2104 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,114 INFO L93 Difference]: Finished difference Result 2543 states and 7159 transitions. [2021-07-09 17:31:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:31:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,117 INFO L225 Difference]: With dead ends: 2543 [2021-07-09 17:31:23,117 INFO L226 Difference]: Without dead ends: 2543 [2021-07-09 17:31:23,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:31:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-07-09 17:31:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2128. [2021-07-09 17:31:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.938410907381288) internal successors, (6250), 2127 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6250 transitions. [2021-07-09 17:31:23,144 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6250 transitions. Word has length 21 [2021-07-09 17:31:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,144 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 6250 transitions. [2021-07-09 17:31:23,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6250 transitions. [2021-07-09 17:31:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:23,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,146 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39680,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,347 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 374 times [2021-07-09 17:31:23,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461006760] [2021-07-09 17:31:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461006760] [2021-07-09 17:31:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461006760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228749254] [2021-07-09 17:31:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228749254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:23,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791104938] [2021-07-09 17:31:23,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:23,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:23,473 INFO L87 Difference]: Start difference. First operand 2128 states and 6250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,577 INFO L93 Difference]: Finished difference Result 2474 states and 6959 transitions. [2021-07-09 17:31:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,580 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 17:31:23,580 INFO L226 Difference]: Without dead ends: 2474 [2021-07-09 17:31:23,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-07-09 17:31:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2190. [2021-07-09 17:31:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.9520328917313843) internal successors, (6462), 2189 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 6462 transitions. [2021-07-09 17:31:23,607 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 6462 transitions. Word has length 21 [2021-07-09 17:31:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,607 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 6462 transitions. [2021-07-09 17:31:23,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 6462 transitions. [2021-07-09 17:31:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:23,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,610 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39681 [2021-07-09 17:31:23,810 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 375 times [2021-07-09 17:31:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429502102] [2021-07-09 17:31:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429502102] [2021-07-09 17:31:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429502102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783463594] [2021-07-09 17:31:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:23,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783463594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092841401] [2021-07-09 17:31:23,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:23,948 INFO L87 Difference]: Start difference. First operand 2190 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,157 INFO L93 Difference]: Finished difference Result 2504 states and 7007 transitions. [2021-07-09 17:31:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,161 INFO L225 Difference]: With dead ends: 2504 [2021-07-09 17:31:24,161 INFO L226 Difference]: Without dead ends: 2500 [2021-07-09 17:31:24,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-07-09 17:31:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2209. [2021-07-09 17:31:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9556159420289854) internal successors, (6526), 2208 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6526 transitions. [2021-07-09 17:31:24,187 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6526 transitions. Word has length 21 [2021-07-09 17:31:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,188 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6526 transitions. [2021-07-09 17:31:24,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6526 transitions. [2021-07-09 17:31:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:24,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,190 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39682,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,390 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 376 times [2021-07-09 17:31:24,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754246830] [2021-07-09 17:31:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754246830] [2021-07-09 17:31:24,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754246830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160815341] [2021-07-09 17:31:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160815341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898584443] [2021-07-09 17:31:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:24,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:24,545 INFO L87 Difference]: Start difference. First operand 2209 states and 6526 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,687 INFO L93 Difference]: Finished difference Result 2434 states and 6886 transitions. [2021-07-09 17:31:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,691 INFO L225 Difference]: With dead ends: 2434 [2021-07-09 17:31:24,691 INFO L226 Difference]: Without dead ends: 2428 [2021-07-09 17:31:24,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-07-09 17:31:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2021-07-09 17:31:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.948401826484018) internal successors, (6457), 2190 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6457 transitions. [2021-07-09 17:31:24,717 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6457 transitions. Word has length 21 [2021-07-09 17:31:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,717 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 6457 transitions. [2021-07-09 17:31:24,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6457 transitions. [2021-07-09 17:31:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:24,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,719 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39683,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,925 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 377 times [2021-07-09 17:31:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261195455] [2021-07-09 17:31:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261195455] [2021-07-09 17:31:24,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261195455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282390986] [2021-07-09 17:31:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282390986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:25,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94908229] [2021-07-09 17:31:25,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:25,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:25,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:25,055 INFO L87 Difference]: Start difference. First operand 2191 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,133 INFO L93 Difference]: Finished difference Result 2597 states and 7234 transitions. [2021-07-09 17:31:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,137 INFO L225 Difference]: With dead ends: 2597 [2021-07-09 17:31:25,137 INFO L226 Difference]: Without dead ends: 2597 [2021-07-09 17:31:25,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-07-09 17:31:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2201. [2021-07-09 17:31:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.945909090909091) internal successors, (6481), 2200 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6481 transitions. [2021-07-09 17:31:25,166 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6481 transitions. Word has length 21 [2021-07-09 17:31:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,166 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6481 transitions. [2021-07-09 17:31:25,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6481 transitions. [2021-07-09 17:31:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:25,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,169 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39684,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,369 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 378 times [2021-07-09 17:31:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314132938] [2021-07-09 17:31:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314132938] [2021-07-09 17:31:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314132938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691753759] [2021-07-09 17:31:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691753759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:25,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150476222] [2021-07-09 17:31:25,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:25,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:25,482 INFO L87 Difference]: Start difference. First operand 2201 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,617 INFO L93 Difference]: Finished difference Result 2455 states and 6971 transitions. [2021-07-09 17:31:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,621 INFO L225 Difference]: With dead ends: 2455 [2021-07-09 17:31:25,621 INFO L226 Difference]: Without dead ends: 2449 [2021-07-09 17:31:25,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-07-09 17:31:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2201. [2021-07-09 17:31:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.9454545454545453) internal successors, (6480), 2200 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6480 transitions. [2021-07-09 17:31:25,646 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6480 transitions. Word has length 21 [2021-07-09 17:31:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,647 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6480 transitions. [2021-07-09 17:31:25,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6480 transitions. [2021-07-09 17:31:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:25,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,649 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39685,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,849 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 379 times [2021-07-09 17:31:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007428242] [2021-07-09 17:31:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007428242] [2021-07-09 17:31:25,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007428242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905208243] [2021-07-09 17:31:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905208243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139793817] [2021-07-09 17:31:25,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:25,973 INFO L87 Difference]: Start difference. First operand 2201 states and 6480 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:26,072 INFO L93 Difference]: Finished difference Result 2588 states and 7244 transitions. [2021-07-09 17:31:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:26,076 INFO L225 Difference]: With dead ends: 2588 [2021-07-09 17:31:26,076 INFO L226 Difference]: Without dead ends: 2588 [2021-07-09 17:31:26,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-07-09 17:31:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2203. [2021-07-09 17:31:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9436875567665757) internal successors, (6482), 2202 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6482 transitions. [2021-07-09 17:31:26,102 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6482 transitions. Word has length 21 [2021-07-09 17:31:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,102 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6482 transitions. [2021-07-09 17:31:26,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6482 transitions. [2021-07-09 17:31:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:26,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,104 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39686,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,305 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 380 times [2021-07-09 17:31:26,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888192447] [2021-07-09 17:31:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888192447] [2021-07-09 17:31:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888192447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111740834] [2021-07-09 17:31:26,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111740834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:26,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254517712] [2021-07-09 17:31:26,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:26,431 INFO L87 Difference]: Start difference. First operand 2203 states and 6482 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:26,570 INFO L93 Difference]: Finished difference Result 2575 states and 7311 transitions. [2021-07-09 17:31:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:26,574 INFO L225 Difference]: With dead ends: 2575 [2021-07-09 17:31:26,574 INFO L226 Difference]: Without dead ends: 2561 [2021-07-09 17:31:26,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-07-09 17:31:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2203. [2021-07-09 17:31:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9432334241598546) internal successors, (6481), 2202 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6481 transitions. [2021-07-09 17:31:26,601 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6481 transitions. Word has length 21 [2021-07-09 17:31:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,601 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6481 transitions. [2021-07-09 17:31:26,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6481 transitions. [2021-07-09 17:31:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:26,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,604 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39687,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,804 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 381 times [2021-07-09 17:31:26,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602352871] [2021-07-09 17:31:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602352871] [2021-07-09 17:31:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602352871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259087739] [2021-07-09 17:31:26,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259087739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:26,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230149297] [2021-07-09 17:31:26,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:26,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:26,951 INFO L87 Difference]: Start difference. First operand 2203 states and 6481 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,198 INFO L93 Difference]: Finished difference Result 2783 states and 7906 transitions. [2021-07-09 17:31:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:27,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:27,202 INFO L225 Difference]: With dead ends: 2783 [2021-07-09 17:31:27,202 INFO L226 Difference]: Without dead ends: 2783 [2021-07-09 17:31:27,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:31:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-07-09 17:31:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2246. [2021-07-09 17:31:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 2.9469933184855233) internal successors, (6616), 2245 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 6616 transitions. [2021-07-09 17:31:27,229 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 6616 transitions. Word has length 21 [2021-07-09 17:31:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,229 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 6616 transitions. [2021-07-09 17:31:27,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 6616 transitions. [2021-07-09 17:31:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:27,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,231 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39688 [2021-07-09 17:31:27,432 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 382 times [2021-07-09 17:31:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127635935] [2021-07-09 17:31:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:27,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127635935] [2021-07-09 17:31:27,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127635935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831688186] [2021-07-09 17:31:27,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831688186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:27,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:27,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898842790] [2021-07-09 17:31:27,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:27,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:27,557 INFO L87 Difference]: Start difference. First operand 2246 states and 6616 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,716 INFO L93 Difference]: Finished difference Result 2809 states and 7847 transitions. [2021-07-09 17:31:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:27,720 INFO L225 Difference]: With dead ends: 2809 [2021-07-09 17:31:27,720 INFO L226 Difference]: Without dead ends: 2795 [2021-07-09 17:31:27,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-07-09 17:31:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2250. [2021-07-09 17:31:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.94619831036016) internal successors, (6626), 2249 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 6626 transitions. [2021-07-09 17:31:27,748 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 6626 transitions. Word has length 21 [2021-07-09 17:31:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,749 INFO L482 AbstractCegarLoop]: Abstraction has 2250 states and 6626 transitions. [2021-07-09 17:31:27,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 6626 transitions. [2021-07-09 17:31:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:27,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,751 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39689 [2021-07-09 17:31:27,951 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,951 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 383 times [2021-07-09 17:31:27,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847177498] [2021-07-09 17:31:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847177498] [2021-07-09 17:31:28,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847177498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681310231] [2021-07-09 17:31:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681310231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160077114] [2021-07-09 17:31:28,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:28,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:28,086 INFO L87 Difference]: Start difference. First operand 2250 states and 6626 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,284 INFO L93 Difference]: Finished difference Result 2507 states and 7160 transitions. [2021-07-09 17:31:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,287 INFO L225 Difference]: With dead ends: 2507 [2021-07-09 17:31:28,287 INFO L226 Difference]: Without dead ends: 2507 [2021-07-09 17:31:28,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-09 17:31:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2256. [2021-07-09 17:31:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.946341463414634) internal successors, (6644), 2255 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6644 transitions. [2021-07-09 17:31:28,312 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6644 transitions. Word has length 21 [2021-07-09 17:31:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,312 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6644 transitions. [2021-07-09 17:31:28,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6644 transitions. [2021-07-09 17:31:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:28,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,315 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39690 [2021-07-09 17:31:28,515 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 384 times [2021-07-09 17:31:28,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222496476] [2021-07-09 17:31:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222496476] [2021-07-09 17:31:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222496476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382173226] [2021-07-09 17:31:28,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:28,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382173226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:28,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352830485] [2021-07-09 17:31:28,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:28,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:28,647 INFO L87 Difference]: Start difference. First operand 2256 states and 6644 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,727 INFO L93 Difference]: Finished difference Result 2564 states and 7327 transitions. [2021-07-09 17:31:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,731 INFO L225 Difference]: With dead ends: 2564 [2021-07-09 17:31:28,731 INFO L226 Difference]: Without dead ends: 2548 [2021-07-09 17:31:28,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-09 17:31:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2256. [2021-07-09 17:31:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.9458980044345897) internal successors, (6643), 2255 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6643 transitions. [2021-07-09 17:31:28,760 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6643 transitions. Word has length 21 [2021-07-09 17:31:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,760 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6643 transitions. [2021-07-09 17:31:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6643 transitions. [2021-07-09 17:31:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:28,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,762 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39691,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,963 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 385 times [2021-07-09 17:31:28,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957647587] [2021-07-09 17:31:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957647587] [2021-07-09 17:31:29,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957647587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486957826] [2021-07-09 17:31:29,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486957826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:29,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899413611] [2021-07-09 17:31:29,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:29,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:29,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:29,101 INFO L87 Difference]: Start difference. First operand 2256 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,339 INFO L93 Difference]: Finished difference Result 2604 states and 7425 transitions. [2021-07-09 17:31:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,342 INFO L225 Difference]: With dead ends: 2604 [2021-07-09 17:31:29,342 INFO L226 Difference]: Without dead ends: 2604 [2021-07-09 17:31:29,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:31:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-09 17:31:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2270. [2021-07-09 17:31:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 2.9457910973997357) internal successors, (6684), 2269 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 6684 transitions. [2021-07-09 17:31:29,368 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 6684 transitions. Word has length 21 [2021-07-09 17:31:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,368 INFO L482 AbstractCegarLoop]: Abstraction has 2270 states and 6684 transitions. [2021-07-09 17:31:29,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 6684 transitions. [2021-07-09 17:31:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:29,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,371 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:29,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39692,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,571 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 386 times [2021-07-09 17:31:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:29,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151850614] [2021-07-09 17:31:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151850614] [2021-07-09 17:31:29,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151850614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410767799] [2021-07-09 17:31:29,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410767799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030156774] [2021-07-09 17:31:29,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:29,690 INFO L87 Difference]: Start difference. First operand 2270 states and 6684 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,769 INFO L93 Difference]: Finished difference Result 2879 states and 8100 transitions. [2021-07-09 17:31:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,773 INFO L225 Difference]: With dead ends: 2879 [2021-07-09 17:31:29,773 INFO L226 Difference]: Without dead ends: 2879 [2021-07-09 17:31:29,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-07-09 17:31:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2519. [2021-07-09 17:31:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.9785544082605244) internal successors, (7500), 2518 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7500 transitions. [2021-07-09 17:31:29,805 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7500 transitions. Word has length 21 [2021-07-09 17:31:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,805 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7500 transitions. [2021-07-09 17:31:29,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7500 transitions. [2021-07-09 17:31:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:29,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,808 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39693,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,009 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 387 times [2021-07-09 17:31:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432754810] [2021-07-09 17:31:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432754810] [2021-07-09 17:31:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432754810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425605334] [2021-07-09 17:31:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:31:30,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425605334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:30,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693174276] [2021-07-09 17:31:30,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:30,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:30,121 INFO L87 Difference]: Start difference. First operand 2519 states and 7500 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,286 INFO L93 Difference]: Finished difference Result 2785 states and 7952 transitions. [2021-07-09 17:31:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,290 INFO L225 Difference]: With dead ends: 2785 [2021-07-09 17:31:30,290 INFO L226 Difference]: Without dead ends: 2783 [2021-07-09 17:31:30,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-07-09 17:31:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2541. [2021-07-09 17:31:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.984645669291339) internal successors, (7581), 2540 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7581 transitions. [2021-07-09 17:31:30,320 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7581 transitions. Word has length 21 [2021-07-09 17:31:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,320 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7581 transitions. [2021-07-09 17:31:30,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7581 transitions. [2021-07-09 17:31:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:30,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,323 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39694,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,523 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 388 times [2021-07-09 17:31:30,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320789081] [2021-07-09 17:31:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320789081] [2021-07-09 17:31:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320789081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739456692] [2021-07-09 17:31:30,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739456692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:30,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565727824] [2021-07-09 17:31:30,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:30,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:30,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:30,629 INFO L87 Difference]: Start difference. First operand 2541 states and 7581 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,778 INFO L93 Difference]: Finished difference Result 2878 states and 8139 transitions. [2021-07-09 17:31:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,782 INFO L225 Difference]: With dead ends: 2878 [2021-07-09 17:31:30,782 INFO L226 Difference]: Without dead ends: 2876 [2021-07-09 17:31:30,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-07-09 17:31:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2523. [2021-07-09 17:31:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.978191911181602) internal successors, (7511), 2522 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7511 transitions. [2021-07-09 17:31:30,813 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7511 transitions. Word has length 21 [2021-07-09 17:31:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,813 INFO L482 AbstractCegarLoop]: Abstraction has 2523 states and 7511 transitions. [2021-07-09 17:31:30,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7511 transitions. [2021-07-09 17:31:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:30,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,815 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39695 [2021-07-09 17:31:31,016 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,016 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 389 times [2021-07-09 17:31:31,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240246869] [2021-07-09 17:31:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240246869] [2021-07-09 17:31:31,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240246869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032937626] [2021-07-09 17:31:31,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:31:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032937626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949150740] [2021-07-09 17:31:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:31,134 INFO L87 Difference]: Start difference. First operand 2523 states and 7511 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,239 INFO L93 Difference]: Finished difference Result 2854 states and 8107 transitions. [2021-07-09 17:31:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,243 INFO L225 Difference]: With dead ends: 2854 [2021-07-09 17:31:31,243 INFO L226 Difference]: Without dead ends: 2854 [2021-07-09 17:31:31,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-07-09 17:31:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2529. [2021-07-09 17:31:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.978243670886076) internal successors, (7529), 2528 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7529 transitions. [2021-07-09 17:31:31,291 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7529 transitions. Word has length 21 [2021-07-09 17:31:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,291 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7529 transitions. [2021-07-09 17:31:31,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7529 transitions. [2021-07-09 17:31:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:31,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,294 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39696,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,494 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 390 times [2021-07-09 17:31:31,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106640645] [2021-07-09 17:31:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106640645] [2021-07-09 17:31:31,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106640645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588786833] [2021-07-09 17:31:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588786833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:31,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542024282] [2021-07-09 17:31:31,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:31,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:31,603 INFO L87 Difference]: Start difference. First operand 2529 states and 7529 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,756 INFO L93 Difference]: Finished difference Result 2971 states and 8408 transitions. [2021-07-09 17:31:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:31,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,760 INFO L225 Difference]: With dead ends: 2971 [2021-07-09 17:31:31,760 INFO L226 Difference]: Without dead ends: 2967 [2021-07-09 17:31:31,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-07-09 17:31:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2529. [2021-07-09 17:31:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.9778481012658227) internal successors, (7528), 2528 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7528 transitions. [2021-07-09 17:31:31,791 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7528 transitions. Word has length 21 [2021-07-09 17:31:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,791 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7528 transitions. [2021-07-09 17:31:31,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7528 transitions. [2021-07-09 17:31:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:31,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,794 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39697,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,994 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 391 times [2021-07-09 17:31:31,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573233053] [2021-07-09 17:31:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573233053] [2021-07-09 17:31:32,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573233053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227274158] [2021-07-09 17:31:32,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227274158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587576297] [2021-07-09 17:31:32,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:32,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:32,120 INFO L87 Difference]: Start difference. First operand 2529 states and 7528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,259 INFO L93 Difference]: Finished difference Result 2883 states and 8203 transitions. [2021-07-09 17:31:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,263 INFO L225 Difference]: With dead ends: 2883 [2021-07-09 17:31:32,263 INFO L226 Difference]: Without dead ends: 2883 [2021-07-09 17:31:32,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-07-09 17:31:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2549. [2021-07-09 17:31:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.9803767660910516) internal successors, (7594), 2548 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7594 transitions. [2021-07-09 17:31:32,294 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7594 transitions. Word has length 21 [2021-07-09 17:31:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,294 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7594 transitions. [2021-07-09 17:31:32,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7594 transitions. [2021-07-09 17:31:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:32,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,297 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39698,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,497 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 392 times [2021-07-09 17:31:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244747484] [2021-07-09 17:31:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244747484] [2021-07-09 17:31:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244747484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137820205] [2021-07-09 17:31:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137820205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607657636] [2021-07-09 17:31:32,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:32,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:32,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:32,602 INFO L87 Difference]: Start difference. First operand 2549 states and 7594 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,749 INFO L93 Difference]: Finished difference Result 2952 states and 8363 transitions. [2021-07-09 17:31:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,753 INFO L225 Difference]: With dead ends: 2952 [2021-07-09 17:31:32,753 INFO L226 Difference]: Without dead ends: 2946 [2021-07-09 17:31:32,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-07-09 17:31:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2549. [2021-07-09 17:31:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.979984301412873) internal successors, (7593), 2548 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7593 transitions. [2021-07-09 17:31:32,783 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7593 transitions. Word has length 21 [2021-07-09 17:31:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,783 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7593 transitions. [2021-07-09 17:31:32,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7593 transitions. [2021-07-09 17:31:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:32,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,785 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39699,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,986 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 393 times [2021-07-09 17:31:32,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026589742] [2021-07-09 17:31:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026589742] [2021-07-09 17:31:33,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026589742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349471824] [2021-07-09 17:31:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349471824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:33,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852077285] [2021-07-09 17:31:33,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:33,103 INFO L87 Difference]: Start difference. First operand 2549 states and 7593 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,259 INFO L93 Difference]: Finished difference Result 2990 states and 8433 transitions. [2021-07-09 17:31:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,263 INFO L225 Difference]: With dead ends: 2990 [2021-07-09 17:31:33,263 INFO L226 Difference]: Without dead ends: 2982 [2021-07-09 17:31:33,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-07-09 17:31:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2581. [2021-07-09 17:31:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 2.9864341085271318) internal successors, (7705), 2580 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 7705 transitions. [2021-07-09 17:31:33,295 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 7705 transitions. Word has length 21 [2021-07-09 17:31:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,295 INFO L482 AbstractCegarLoop]: Abstraction has 2581 states and 7705 transitions. [2021-07-09 17:31:33,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 7705 transitions. [2021-07-09 17:31:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:33,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,298 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:33,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39700 [2021-07-09 17:31:33,498 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 394 times [2021-07-09 17:31:33,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:33,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636649760] [2021-07-09 17:31:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:33,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636649760] [2021-07-09 17:31:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636649760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419278078] [2021-07-09 17:31:33,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419278078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:33,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012418503] [2021-07-09 17:31:33,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:33,621 INFO L87 Difference]: Start difference. First operand 2581 states and 7705 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,781 INFO L93 Difference]: Finished difference Result 2910 states and 8395 transitions. [2021-07-09 17:31:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,784 INFO L225 Difference]: With dead ends: 2910 [2021-07-09 17:31:33,785 INFO L226 Difference]: Without dead ends: 2910 [2021-07-09 17:31:33,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-07-09 17:31:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2663. [2021-07-09 17:31:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.989105935386927) internal successors, (7957), 2662 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7957 transitions. [2021-07-09 17:31:33,817 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7957 transitions. Word has length 21 [2021-07-09 17:31:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,817 INFO L482 AbstractCegarLoop]: Abstraction has 2663 states and 7957 transitions. [2021-07-09 17:31:33,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7957 transitions. [2021-07-09 17:31:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:33,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,820 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39701,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,021 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 395 times [2021-07-09 17:31:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542768998] [2021-07-09 17:31:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542768998] [2021-07-09 17:31:34,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542768998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505577950] [2021-07-09 17:31:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505577950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484402116] [2021-07-09 17:31:34,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:34,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:34,135 INFO L87 Difference]: Start difference. First operand 2663 states and 7957 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:34,284 INFO L93 Difference]: Finished difference Result 3615 states and 10212 transitions. [2021-07-09 17:31:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:34,290 INFO L225 Difference]: With dead ends: 3615 [2021-07-09 17:31:34,290 INFO L226 Difference]: Without dead ends: 3605 [2021-07-09 17:31:34,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-07-09 17:31:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2661. [2021-07-09 17:31:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.9890977443609024) internal successors, (7951), 2660 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7951 transitions. [2021-07-09 17:31:34,326 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7951 transitions. Word has length 21 [2021-07-09 17:31:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:34,327 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7951 transitions. [2021-07-09 17:31:34,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7951 transitions. [2021-07-09 17:31:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:34,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:34,329 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39702 [2021-07-09 17:31:34,530 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 396 times [2021-07-09 17:31:34,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421491756] [2021-07-09 17:31:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421491756] [2021-07-09 17:31:34,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421491756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934533623] [2021-07-09 17:31:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934533623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:34,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160780516] [2021-07-09 17:31:34,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:34,655 INFO L87 Difference]: Start difference. First operand 2661 states and 7951 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:34,794 INFO L93 Difference]: Finished difference Result 3050 states and 8892 transitions. [2021-07-09 17:31:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:34,798 INFO L225 Difference]: With dead ends: 3050 [2021-07-09 17:31:34,798 INFO L226 Difference]: Without dead ends: 3050 [2021-07-09 17:31:34,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-07-09 17:31:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2842. [2021-07-09 17:31:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9922562478000705) internal successors, (8501), 2841 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8501 transitions. [2021-07-09 17:31:34,832 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8501 transitions. Word has length 21 [2021-07-09 17:31:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:34,832 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8501 transitions. [2021-07-09 17:31:34,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8501 transitions. [2021-07-09 17:31:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:34,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:34,835 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39703 [2021-07-09 17:31:35,035 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 397 times [2021-07-09 17:31:35,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042323365] [2021-07-09 17:31:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:35,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042323365] [2021-07-09 17:31:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042323365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952583190] [2021-07-09 17:31:35,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:35,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952583190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873513386] [2021-07-09 17:31:35,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:35,156 INFO L87 Difference]: Start difference. First operand 2842 states and 8501 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,307 INFO L93 Difference]: Finished difference Result 3614 states and 10275 transitions. [2021-07-09 17:31:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:35,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,312 INFO L225 Difference]: With dead ends: 3614 [2021-07-09 17:31:35,312 INFO L226 Difference]: Without dead ends: 3602 [2021-07-09 17:31:35,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-07-09 17:31:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2842. [2021-07-09 17:31:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9915522703273494) internal successors, (8499), 2841 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8499 transitions. [2021-07-09 17:31:35,351 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8499 transitions. Word has length 21 [2021-07-09 17:31:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,351 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8499 transitions. [2021-07-09 17:31:35,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8499 transitions. [2021-07-09 17:31:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:35,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,354 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39704 [2021-07-09 17:31:35,555 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 398 times [2021-07-09 17:31:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643848454] [2021-07-09 17:31:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:35,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643848454] [2021-07-09 17:31:35,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643848454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746278202] [2021-07-09 17:31:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:35,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746278202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:31:35,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857449813] [2021-07-09 17:31:35,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:35,679 INFO L87 Difference]: Start difference. First operand 2842 states and 8499 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,772 INFO L93 Difference]: Finished difference Result 2996 states and 8829 transitions. [2021-07-09 17:31:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,776 INFO L225 Difference]: With dead ends: 2996 [2021-07-09 17:31:35,776 INFO L226 Difference]: Without dead ends: 2996 [2021-07-09 17:31:35,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-07-09 17:31:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2879. [2021-07-09 17:31:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.991660875608061) internal successors, (8610), 2878 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8610 transitions. [2021-07-09 17:31:35,807 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8610 transitions. Word has length 21 [2021-07-09 17:31:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,807 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8610 transitions. [2021-07-09 17:31:35,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8610 transitions. [2021-07-09 17:31:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:35,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,810 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:36,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39705 [2021-07-09 17:31:36,010 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 399 times [2021-07-09 17:31:36,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:36,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196500908] [2021-07-09 17:31:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196500908] [2021-07-09 17:31:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196500908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061197697] [2021-07-09 17:31:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061197697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709938199] [2021-07-09 17:31:36,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:36,139 INFO L87 Difference]: Start difference. First operand 2879 states and 8610 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,303 INFO L93 Difference]: Finished difference Result 3624 states and 10338 transitions. [2021-07-09 17:31:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,308 INFO L225 Difference]: With dead ends: 3624 [2021-07-09 17:31:36,308 INFO L226 Difference]: Without dead ends: 3610 [2021-07-09 17:31:36,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-07-09 17:31:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2900. [2021-07-09 17:31:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 2.9913763366678165) internal successors, (8672), 2899 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 8672 transitions. [2021-07-09 17:31:36,348 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 8672 transitions. Word has length 21 [2021-07-09 17:31:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,348 INFO L482 AbstractCegarLoop]: Abstraction has 2900 states and 8672 transitions. [2021-07-09 17:31:36,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 8672 transitions. [2021-07-09 17:31:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:36,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,371 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:36,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39706,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,571 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 400 times [2021-07-09 17:31:36,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:36,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332575683] [2021-07-09 17:31:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332575683] [2021-07-09 17:31:36,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332575683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573678247] [2021-07-09 17:31:36,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:36,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573678247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:36,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000040040] [2021-07-09 17:31:36,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:36,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:36,703 INFO L87 Difference]: Start difference. First operand 2900 states and 8672 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,852 INFO L93 Difference]: Finished difference Result 3081 states and 9020 transitions. [2021-07-09 17:31:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,856 INFO L225 Difference]: With dead ends: 3081 [2021-07-09 17:31:36,856 INFO L226 Difference]: Without dead ends: 3081 [2021-07-09 17:31:36,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-07-09 17:31:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2899. [2021-07-09 17:31:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9913733609385784) internal successors, (8669), 2898 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8669 transitions. [2021-07-09 17:31:36,890 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8669 transitions. Word has length 21 [2021-07-09 17:31:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8669 transitions. [2021-07-09 17:31:36,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8669 transitions. [2021-07-09 17:31:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:36,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,893 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39707 [2021-07-09 17:31:37,094 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 401 times [2021-07-09 17:31:37,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414676638] [2021-07-09 17:31:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414676638] [2021-07-09 17:31:37,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414676638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337801573] [2021-07-09 17:31:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:37,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337801573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:37,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:37,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036147703] [2021-07-09 17:31:37,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:37,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:37,223 INFO L87 Difference]: Start difference. First operand 2899 states and 8669 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:37,309 INFO L93 Difference]: Finished difference Result 3250 states and 9452 transitions. [2021-07-09 17:31:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:37,314 INFO L225 Difference]: With dead ends: 3250 [2021-07-09 17:31:37,314 INFO L226 Difference]: Without dead ends: 3234 [2021-07-09 17:31:37,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-07-09 17:31:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2899. [2021-07-09 17:31:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9910282953761214) internal successors, (8668), 2898 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8668 transitions. [2021-07-09 17:31:37,352 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8668 transitions. Word has length 21 [2021-07-09 17:31:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:37,353 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8668 transitions. [2021-07-09 17:31:37,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8668 transitions. [2021-07-09 17:31:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:37,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:37,356 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39708,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,556 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 402 times [2021-07-09 17:31:37,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264661786] [2021-07-09 17:31:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264661786] [2021-07-09 17:31:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264661786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226114617] [2021-07-09 17:31:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:31:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226114617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:37,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:37,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926764234] [2021-07-09 17:31:37,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:37,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:37,696 INFO L87 Difference]: Start difference. First operand 2899 states and 8668 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:37,891 INFO L93 Difference]: Finished difference Result 3186 states and 9298 transitions. [2021-07-09 17:31:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:37,896 INFO L225 Difference]: With dead ends: 3186 [2021-07-09 17:31:37,896 INFO L226 Difference]: Without dead ends: 3186 [2021-07-09 17:31:37,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-07-09 17:31:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2911. [2021-07-09 17:31:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.99106529209622) internal successors, (8704), 2910 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 8704 transitions. [2021-07-09 17:31:37,934 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 8704 transitions. Word has length 21 [2021-07-09 17:31:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:37,934 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 8704 transitions. [2021-07-09 17:31:37,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 8704 transitions. [2021-07-09 17:31:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:37,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:37,937 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:38,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,138 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:38,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 403 times [2021-07-09 17:31:38,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:38,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600734310] [2021-07-09 17:31:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:38,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600734310] [2021-07-09 17:31:38,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600734310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422457347] [2021-07-09 17:31:38,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422457347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:38,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200797836] [2021-07-09 17:31:38,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:38,272 INFO L87 Difference]: Start difference. First operand 2911 states and 8704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:38,346 INFO L93 Difference]: Finished difference Result 3241 states and 9439 transitions. [2021-07-09 17:31:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:38,352 INFO L225 Difference]: With dead ends: 3241 [2021-07-09 17:31:38,352 INFO L226 Difference]: Without dead ends: 3223 [2021-07-09 17:31:38,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-07-09 17:31:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2909. [2021-07-09 17:31:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.9917469050894083) internal successors, (8700), 2908 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 8700 transitions. [2021-07-09 17:31:38,387 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 8700 transitions. Word has length 21 [2021-07-09 17:31:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:38,387 INFO L482 AbstractCegarLoop]: Abstraction has 2909 states and 8700 transitions. [2021-07-09 17:31:38,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 8700 transitions. [2021-07-09 17:31:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:31:38,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:38,390 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:38,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39710 [2021-07-09 17:31:38,590 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 404 times [2021-07-09 17:31:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:38,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452352882] [2021-07-09 17:31:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:38,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452352882] [2021-07-09 17:31:38,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452352882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243041311] [2021-07-09 17:31:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:38,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:31:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243041311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:38,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:31:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372362000] [2021-07-09 17:31:38,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:38,754 INFO L87 Difference]: Start difference. First operand 2909 states and 8700 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:38,972 INFO L93 Difference]: Finished difference Result 3418 states and 9945 transitions. [2021-07-09 17:31:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:31:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:38,977 INFO L225 Difference]: With dead ends: 3418 [2021-07-09 17:31:38,977 INFO L226 Difference]: Without dead ends: 3418 [2021-07-09 17:31:38,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-07-09 17:31:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2927. [2021-07-09 17:31:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.9907723855092274) internal successors, (8751), 2926 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8751 transitions. [2021-07-09 17:31:39,013 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8751 transitions. Word has length 21 [2021-07-09 17:31:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,013 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 8751 transitions. [2021-07-09 17:31:39,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8751 transitions. [2021-07-09 17:31:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:39,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,016 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:39,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39711 [2021-07-09 17:31:39,217 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 405 times [2021-07-09 17:31:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:39,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759375746] [2021-07-09 17:31:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759375746] [2021-07-09 17:31:39,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759375746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376914905] [2021-07-09 17:31:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:39,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,914 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:31:39,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:31:41,409 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 427 [2021-07-09 17:31:41,705 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-07-09 17:31:42,019 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-07-09 17:31:42,359 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 511 [2021-07-09 17:31:42,759 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 538 [2021-07-09 17:31:43,044 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 305 [2021-07-09 17:31:43,725 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-07-09 17:31:43,944 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-07-09 17:31:44,229 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 402 [2021-07-09 17:31:44,411 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 417 [2021-07-09 17:31:44,749 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 353 [2021-07-09 17:31:45,348 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 222 [2021-07-09 17:31:45,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:45,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:31:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376914905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:31:45,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316525378] [2021-07-09 17:31:45,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:31:45,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:31:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:45,949 INFO L87 Difference]: Start difference. First operand 2927 states and 8751 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:46,432 INFO L93 Difference]: Finished difference Result 3024 states and 8948 transitions. [2021-07-09 17:31:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:31:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:46,437 INFO L225 Difference]: With dead ends: 3024 [2021-07-09 17:31:46,437 INFO L226 Difference]: Without dead ends: 2991 [2021-07-09 17:31:46,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:31:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-07-09 17:31:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2948. [2021-07-09 17:31:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 2.98982015609094) internal successors, (8811), 2947 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 8811 transitions. [2021-07-09 17:31:46,470 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 8811 transitions. Word has length 22 [2021-07-09 17:31:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:46,470 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 8811 transitions. [2021-07-09 17:31:46,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 8811 transitions. [2021-07-09 17:31:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:46,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:46,473 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:46,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39712 [2021-07-09 17:31:46,674 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:46,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 406 times [2021-07-09 17:31:46,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:46,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588144929] [2021-07-09 17:31:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588144929] [2021-07-09 17:31:46,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588144929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805653796] [2021-07-09 17:31:46,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:46,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:46,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,303 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:31:47,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:31:48,336 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 289 [2021-07-09 17:31:48,572 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-07-09 17:31:48,754 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-07-09 17:31:48,955 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 317 [2021-07-09 17:31:49,074 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 324 [2021-07-09 17:31:49,410 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 400 [2021-07-09 17:31:49,616 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2021-07-09 17:31:49,791 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 292 [2021-07-09 17:31:50,342 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-07-09 17:31:50,555 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 243 [2021-07-09 17:31:50,787 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 337 [2021-07-09 17:31:51,084 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-07-09 17:31:51,358 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-07-09 17:31:51,672 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 364 [2021-07-09 17:31:51,911 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 368 [2021-07-09 17:31:52,014 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 300 [2021-07-09 17:31:52,934 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 254 [2021-07-09 17:31:54,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:54,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:31:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:54,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805653796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:54,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:31:54,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869681089] [2021-07-09 17:31:54,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:31:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:31:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:54,272 INFO L87 Difference]: Start difference. First operand 2948 states and 8811 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,733 INFO L93 Difference]: Finished difference Result 3054 states and 9036 transitions. [2021-07-09 17:31:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:31:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,738 INFO L225 Difference]: With dead ends: 3054 [2021-07-09 17:31:54,738 INFO L226 Difference]: Without dead ends: 3038 [2021-07-09 17:31:54,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-07-09 17:31:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2970. [2021-07-09 17:31:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-07-09 17:31:54,773 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-07-09 17:31:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,773 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-07-09 17:31:54,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-07-09 17:31:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:54,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,776 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40164 [2021-07-09 17:31:54,977 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 407 times [2021-07-09 17:31:54,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752464408] [2021-07-09 17:31:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:55,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752464408] [2021-07-09 17:31:55,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752464408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832904806] [2021-07-09 17:31:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:55,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:55,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,601 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:31:55,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:31:56,410 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 344 [2021-07-09 17:31:57,117 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 328 [2021-07-09 17:31:57,437 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-07-09 17:31:57,780 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-07-09 17:31:58,165 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 577 [2021-07-09 17:31:58,785 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 742 [2021-07-09 17:31:59,081 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 273 [2021-07-09 17:31:59,779 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 149 [2021-07-09 17:31:59,888 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 172 [2021-07-09 17:32:00,012 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-07-09 17:32:00,227 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 290 [2021-07-09 17:32:00,336 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 491 [2021-07-09 17:32:00,627 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 278 [2021-07-09 17:32:01,484 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 278 [2021-07-09 17:32:01,717 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 352 [2021-07-09 17:32:01,831 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 224 [2021-07-09 17:32:02,994 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 324 [2021-07-09 17:32:03,200 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 334 [2021-07-09 17:32:03,491 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 372 [2021-07-09 17:32:04,104 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 642 [2021-07-09 17:32:05,036 WARN L205 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-07-09 17:32:05,976 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-07-09 17:32:06,959 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 773 [2021-07-09 17:32:07,609 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 624 [2021-07-09 17:32:07,763 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 418 [2021-07-09 17:32:08,682 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-07-09 17:32:08,817 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-07-09 17:32:08,977 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 252 [2021-07-09 17:32:09,138 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 301 [2021-07-09 17:32:09,498 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 239 [2021-07-09 17:32:10,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,807 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:32:10,808 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:32:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:32:11,633 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-07-09 17:32:11,773 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-07-09 17:32:11,950 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 306 [2021-07-09 17:32:12,192 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 383 [2021-07-09 17:32:12,466 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 377 [2021-07-09 17:32:12,765 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 381 [2021-07-09 17:32:12,942 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 289 [2021-07-09 17:32:14,009 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 191 [2021-07-09 17:32:14,139 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 224 [2021-07-09 17:32:15,183 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 233 [2021-07-09 17:32:15,506 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 375 [2021-07-09 17:32:16,714 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 318 [2021-07-09 17:32:17,741 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 263 [2021-07-09 17:32:18,057 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 424 [2021-07-09 17:32:18,883 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 706 [2021-07-09 17:32:19,831 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 1141 DAG size of output: 726 [2021-07-09 17:32:21,074 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1313 DAG size of output: 869 [2021-07-09 17:32:22,529 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1375 DAG size of output: 917 [2021-07-09 17:32:24,346 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1507 DAG size of output: 1013 [2021-07-09 17:32:26,552 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-07-09 17:32:28,745 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-07-09 17:32:31,197 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 1661 DAG size of output: 1107 [2021-07-09 17:32:34,527 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 1109 DAG size of output: 1377 [2021-07-09 17:32:34,691 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 822 DAG size of output: 752 [2021-07-09 17:32:36,039 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 722 DAG size of output: 745 [2021-07-09 17:32:36,253 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 332 [2021-07-09 17:32:36,922 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 218 [2021-07-09 17:32:37,050 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 237 [2021-07-09 17:32:37,277 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 402 [2021-07-09 17:32:37,886 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-07-09 17:32:38,059 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-07-09 17:32:38,348 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 319 [2021-07-09 17:32:38,659 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 338 [2021-07-09 17:32:39,043 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 410 [2021-07-09 17:32:39,506 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 439 [2021-07-09 17:32:39,677 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 933 [2021-07-09 17:32:39,867 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 865 [2021-07-09 17:32:41,710 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 835 DAG size of output: 1011 [2021-07-09 17:32:41,818 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 695 [2021-07-09 17:32:42,814 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 391 [2021-07-09 17:32:43,057 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 395 [2021-07-09 17:32:43,176 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 218 [2021-07-09 17:32:43,718 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 520 [2021-07-09 17:32:44,287 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 564 [2021-07-09 17:32:45,008 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 217 [2021-07-09 17:32:45,313 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 284 [2021-07-09 17:32:45,506 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 329 [2021-07-09 17:32:46,147 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 654 [2021-07-09 17:32:46,904 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 683 [2021-07-09 17:32:47,670 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 685 [2021-07-09 17:32:48,987 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-07-09 17:32:50,275 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-07-09 17:32:51,691 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1643 DAG size of output: 908 [2021-07-09 17:32:52,660 WARN L205 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 910 DAG size of output: 673 [2021-07-09 17:32:52,958 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 324 [2021-07-09 17:32:53,490 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 235 [2021-07-09 17:32:53,709 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-07-09 17:32:53,938 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-07-09 17:32:54,155 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 324 [2021-07-09 17:32:54,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:54,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,876 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:54,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,876 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-07-09 17:32:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832904806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:32:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832201092] [2021-07-09 17:32:54,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:32:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:32:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:54,910 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,299 INFO L93 Difference]: Finished difference Result 3077 states and 9090 transitions. [2021-07-09 17:32:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:32:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,304 INFO L225 Difference]: With dead ends: 3077 [2021-07-09 17:32:55,304 INFO L226 Difference]: Without dead ends: 3067 [2021-07-09 17:32:55,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-07-09 17:32:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2970. [2021-07-09 17:32:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-07-09 17:32:55,339 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-07-09 17:32:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,339 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-07-09 17:32:55,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-07-09 17:32:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:55,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,342 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40835,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,543 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 408 times [2021-07-09 17:32:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576595025] [2021-07-09 17:32:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576595025] [2021-07-09 17:32:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576595025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644050559] [2021-07-09 17:32:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:32:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:55,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:55,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:56,189 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:32:56,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:32:56,949 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-07-09 17:32:57,088 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-07-09 17:32:57,273 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 292 [2021-07-09 17:32:57,556 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 384 [2021-07-09 17:32:57,786 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 295 [2021-07-09 17:32:58,446 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 267 [2021-07-09 17:32:58,883 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 353 [2021-07-09 17:32:59,183 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 448 [2021-07-09 17:32:59,461 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 301 [2021-07-09 17:32:59,564 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 197 [2021-07-09 17:33:00,344 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 277 [2021-07-09 17:33:00,572 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 280 [2021-07-09 17:33:01,173 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-07-09 17:33:01,769 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-07-09 17:33:02,414 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 602 [2021-07-09 17:33:03,071 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 732 [2021-07-09 17:33:03,448 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 442 [2021-07-09 17:33:03,694 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-07-09 17:33:04,301 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 303 [2021-07-09 17:33:04,551 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 433 [2021-07-09 17:33:04,896 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-07-09 17:33:05,214 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-07-09 17:33:05,598 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 474 [2021-07-09 17:33:05,946 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 410 [2021-07-09 17:33:06,131 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 335 [2021-07-09 17:33:06,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:06,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:06,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:06,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:33:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644050559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:06,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:33:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077633244] [2021-07-09 17:33:06,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:33:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:33:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:06,732 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:07,208 INFO L93 Difference]: Finished difference Result 3120 states and 9276 transitions. [2021-07-09 17:33:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:33:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:33:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:07,212 INFO L225 Difference]: With dead ends: 3120 [2021-07-09 17:33:07,212 INFO L226 Difference]: Without dead ends: 3104 [2021-07-09 17:33:07,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:33:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-07-09 17:33:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-07-09 17:33:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.004291845493562) internal successors, (9100), 3029 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9100 transitions. [2021-07-09 17:33:07,252 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9100 transitions. Word has length 22 [2021-07-09 17:33:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:07,252 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9100 transitions. [2021-07-09 17:33:07,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9100 transitions. [2021-07-09 17:33:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:07,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:07,255 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:07,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43471 [2021-07-09 17:33:07,456 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 409 times [2021-07-09 17:33:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:07,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702563034] [2021-07-09 17:33:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702563034] [2021-07-09 17:33:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702563034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751383114] [2021-07-09 17:33:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:08,080 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:33:08,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:33:08,753 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 299 [2021-07-09 17:33:08,905 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 308 [2021-07-09 17:33:09,119 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-07-09 17:33:09,304 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-07-09 17:33:09,523 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 340 [2021-07-09 17:33:09,689 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 429 [2021-07-09 17:33:09,835 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 249 [2021-07-09 17:33:09,978 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-07-09 17:33:10,421 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 200 [2021-07-09 17:33:10,621 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 174 [2021-07-09 17:33:10,936 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 252 [2021-07-09 17:33:11,353 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 432 [2021-07-09 17:33:11,807 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 382 [2021-07-09 17:33:12,160 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 264 [2021-07-09 17:33:12,874 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 249 [2021-07-09 17:33:13,073 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 339 [2021-07-09 17:33:13,526 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 377 [2021-07-09 17:33:13,969 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 552 [2021-07-09 17:33:14,529 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 332 [2021-07-09 17:33:14,649 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 228 [2021-07-09 17:33:15,781 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 269 [2021-07-09 17:33:15,985 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 312 [2021-07-09 17:33:16,729 WARN L205 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 1029 DAG size of output: 698 [2021-07-09 17:33:17,635 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-07-09 17:33:18,530 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-07-09 17:33:19,521 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 854 [2021-07-09 17:33:20,063 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 874 [2021-07-09 17:33:20,973 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 795 [2021-07-09 17:33:21,823 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 356 [2021-07-09 17:33:22,067 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-07-09 17:33:22,309 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-07-09 17:33:22,582 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 416 [2021-07-09 17:33:22,854 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 503 [2021-07-09 17:33:23,156 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 363 [2021-07-09 17:33:24,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,465 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:33:24,465 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:33:24,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:33:25,305 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 244 [2021-07-09 17:33:25,908 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 253 [2021-07-09 17:33:26,624 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 366 [2021-07-09 17:33:26,938 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 405 [2021-07-09 17:33:27,069 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 249 [2021-07-09 17:33:27,643 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 236 [2021-07-09 17:33:27,796 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 258 [2021-07-09 17:33:27,915 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 226 [2021-07-09 17:33:28,586 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-07-09 17:33:28,949 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 422 [2021-07-09 17:33:29,553 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 600 [2021-07-09 17:33:30,289 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-07-09 17:33:31,026 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-07-09 17:33:31,834 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 601 [2021-07-09 17:33:32,713 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 829 [2021-07-09 17:33:33,623 WARN L205 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 731 [2021-07-09 17:33:34,172 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 252 [2021-07-09 17:33:34,780 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 270 [2021-07-09 17:33:35,260 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 516 [2021-07-09 17:33:35,785 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 209 [2021-07-09 17:33:36,375 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-07-09 17:33:36,602 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-07-09 17:33:36,858 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 300 [2021-07-09 17:33:37,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:37,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:37,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,809 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:37,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:37,809 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-07-09 17:33:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751383114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:37,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:33:37,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512389540] [2021-07-09 17:33:37,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:33:37,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:37,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:33:37,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:37,843 INFO L87 Difference]: Start difference. First operand 3030 states and 9100 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:38,472 INFO L93 Difference]: Finished difference Result 3170 states and 9379 transitions. [2021-07-09 17:33:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:33:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:33:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:38,477 INFO L225 Difference]: With dead ends: 3170 [2021-07-09 17:33:38,477 INFO L226 Difference]: Without dead ends: 3151 [2021-07-09 17:33:38,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:33:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-07-09 17:33:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3027. [2021-07-09 17:33:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 3.0023132848645075) internal successors, (9085), 3026 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 9085 transitions. [2021-07-09 17:33:38,512 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 9085 transitions. Word has length 22 [2021-07-09 17:33:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:38,512 INFO L482 AbstractCegarLoop]: Abstraction has 3027 states and 9085 transitions. [2021-07-09 17:33:38,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 9085 transitions. [2021-07-09 17:33:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:38,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:38,515 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:38,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44029 [2021-07-09 17:33:38,716 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 410 times [2021-07-09 17:33:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:38,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506092090] [2021-07-09 17:33:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:38,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506092090] [2021-07-09 17:33:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506092090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598004158] [2021-07-09 17:33:38,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:38,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:38,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:39,350 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:33:39,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:39,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:33:40,091 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-07-09 17:33:40,219 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-07-09 17:33:40,360 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 263 [2021-07-09 17:33:40,655 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 295 [2021-07-09 17:33:40,811 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 177 [2021-07-09 17:33:41,428 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 216 [2021-07-09 17:33:42,038 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 289 [2021-07-09 17:33:42,330 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 334 [2021-07-09 17:33:43,182 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 218 [2021-07-09 17:33:43,303 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 256 [2021-07-09 17:33:44,069 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 355 [2021-07-09 17:33:44,454 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 483 [2021-07-09 17:33:44,934 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 486 [2021-07-09 17:33:45,830 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-07-09 17:33:46,774 WARN L205 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-07-09 17:33:47,786 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 847 DAG size of output: 668 [2021-07-09 17:33:47,996 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 697 [2021-07-09 17:33:48,977 WARN L205 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 766 [2021-07-09 17:33:49,394 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 323 [2021-07-09 17:33:49,958 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-07-09 17:33:50,225 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-07-09 17:33:50,512 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 394 [2021-07-09 17:33:51,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,799 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:33:51,799 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:33:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:33:52,451 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 240 [2021-07-09 17:33:52,580 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-07-09 17:33:52,720 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-07-09 17:33:52,874 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 268 [2021-07-09 17:33:53,155 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 360 [2021-07-09 17:33:53,311 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2021-07-09 17:33:53,969 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-07-09 17:33:54,115 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-07-09 17:33:54,289 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 297 [2021-07-09 17:33:54,510 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 347 [2021-07-09 17:33:55,650 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 213 [2021-07-09 17:33:56,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:56,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:56,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,195 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:56,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:56,196 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-07-09 17:33:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598004158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:56,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:33:56,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409327737] [2021-07-09 17:33:56,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:33:56,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:33:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:56,228 INFO L87 Difference]: Start difference. First operand 3027 states and 9085 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:56,759 INFO L93 Difference]: Finished difference Result 3114 states and 9269 transitions. [2021-07-09 17:33:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:33:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:33:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:56,763 INFO L225 Difference]: With dead ends: 3114 [2021-07-09 17:33:56,763 INFO L226 Difference]: Without dead ends: 3104 [2021-07-09 17:33:56,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:33:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-07-09 17:33:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-07-09 17:33:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.0023109937273027) internal successors, (9094), 3029 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9094 transitions. [2021-07-09 17:33:56,797 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9094 transitions. Word has length 22 [2021-07-09 17:33:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:56,797 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9094 transitions. [2021-07-09 17:33:56,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9094 transitions. [2021-07-09 17:33:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:56,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:56,801 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:57,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45381 [2021-07-09 17:33:57,001 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 411 times [2021-07-09 17:33:57,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:57,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380749794] [2021-07-09 17:33:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:57,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380749794] [2021-07-09 17:33:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380749794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893795851] [2021-07-09 17:33:57,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:33:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:57,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:57,656 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:33:57,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:57,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:33:58,351 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 229 [2021-07-09 17:33:59,002 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 212 [2021-07-09 17:33:59,108 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 214 [2021-07-09 17:34:00,019 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 272 [2021-07-09 17:34:00,172 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 279 [2021-07-09 17:34:00,502 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-07-09 17:34:00,815 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-07-09 17:34:01,181 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 416 [2021-07-09 17:34:01,350 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 386 [2021-07-09 17:34:01,834 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-07-09 17:34:01,957 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-07-09 17:34:02,172 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 306 [2021-07-09 17:34:03,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:03,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:34:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893795851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:03,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:34:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177157392] [2021-07-09 17:34:03,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:34:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:34:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:03,065 INFO L87 Difference]: Start difference. First operand 3030 states and 9094 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:03,553 INFO L93 Difference]: Finished difference Result 3173 states and 9458 transitions. [2021-07-09 17:34:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:34:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:34:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:03,558 INFO L225 Difference]: With dead ends: 3173 [2021-07-09 17:34:03,558 INFO L226 Difference]: Without dead ends: 3157 [2021-07-09 17:34:03,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:34:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-07-09 17:34:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3081. [2021-07-09 17:34:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.0107142857142857) internal successors, (9273), 3080 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 9273 transitions. [2021-07-09 17:34:03,596 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 9273 transitions. Word has length 22 [2021-07-09 17:34:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:03,596 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 9273 transitions. [2021-07-09 17:34:03,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 9273 transitions. [2021-07-09 17:34:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:03,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:03,599 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:03,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46366,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,800 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 412 times [2021-07-09 17:34:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:03,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346722346] [2021-07-09 17:34:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346722346] [2021-07-09 17:34:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346722346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379219064] [2021-07-09 17:34:03,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:03,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:04,428 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:34:04,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:34:05,349 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 239 [2021-07-09 17:34:05,451 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 247 [2021-07-09 17:34:05,677 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-07-09 17:34:05,888 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-07-09 17:34:06,151 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 370 [2021-07-09 17:34:06,436 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 391 [2021-07-09 17:34:06,565 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 268 [2021-07-09 17:34:07,246 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 345 [2021-07-09 17:34:07,814 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 312 [2021-07-09 17:34:08,273 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 260 [2021-07-09 17:34:08,530 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-07-09 17:34:08,761 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-07-09 17:34:09,021 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 314 [2021-07-09 17:34:09,297 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 348 [2021-07-09 17:34:09,407 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 219 [2021-07-09 17:34:09,985 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 235 [2021-07-09 17:34:10,509 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 252 [2021-07-09 17:34:10,622 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 218 [2021-07-09 17:34:11,074 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 266 [2021-07-09 17:34:11,240 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-07-09 17:34:11,405 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-07-09 17:34:11,611 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 371 [2021-07-09 17:34:12,021 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 468 [2021-07-09 17:34:12,272 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 300 [2021-07-09 17:34:12,840 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 337 [2021-07-09 17:34:13,010 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 344 [2021-07-09 17:34:14,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 248 [2021-07-09 17:34:14,336 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-07-09 17:34:14,653 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-07-09 17:34:15,005 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 373 [2021-07-09 17:34:15,126 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 289 [2021-07-09 17:34:15,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,943 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:34:15,944 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:34:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:34:16,826 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 286 [2021-07-09 17:34:16,974 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-07-09 17:34:17,126 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-07-09 17:34:17,280 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-07-09 17:34:17,467 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 314 [2021-07-09 17:34:17,596 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 318 [2021-07-09 17:34:17,897 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 404 [2021-07-09 17:34:18,188 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 295 [2021-07-09 17:34:19,664 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 257 [2021-07-09 17:34:19,931 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 370 [2021-07-09 17:34:20,291 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 440 [2021-07-09 17:34:20,526 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 328 [2021-07-09 17:34:20,840 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 292 [2021-07-09 17:34:21,421 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 246 [2021-07-09 17:34:21,974 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-07-09 17:34:22,306 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 456 [2021-07-09 17:34:23,250 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 540 [2021-07-09 17:34:24,077 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 737 [2021-07-09 17:34:24,950 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 1131 DAG size of output: 782 [2021-07-09 17:34:25,951 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-07-09 17:34:26,969 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-07-09 17:34:28,081 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1156 DAG size of output: 796 [2021-07-09 17:34:28,727 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 531 [2021-07-09 17:34:29,245 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 531 [2021-07-09 17:34:29,444 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 314 [2021-07-09 17:34:30,538 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 250 [2021-07-09 17:34:30,741 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 343 [2021-07-09 17:34:30,985 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-07-09 17:34:31,231 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-07-09 17:34:31,569 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 386 [2021-07-09 17:34:31,778 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 387 [2021-07-09 17:34:32,015 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 439 [2021-07-09 17:34:32,934 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 306 [2021-07-09 17:34:33,112 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-07-09 17:34:33,302 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-07-09 17:34:33,621 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 306 [2021-07-09 17:34:33,875 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 359 [2021-07-09 17:34:34,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:34,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:34,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,304 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:34,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:34,305 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-07-09 17:34:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379219064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:34,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:34:34,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373363819] [2021-07-09 17:34:34,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:34:34,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:34:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:34,339 INFO L87 Difference]: Start difference. First operand 3081 states and 9273 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:35,103 INFO L93 Difference]: Finished difference Result 3278 states and 9699 transitions. [2021-07-09 17:34:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:34:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:34:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:35,107 INFO L225 Difference]: With dead ends: 3278 [2021-07-09 17:34:35,107 INFO L226 Difference]: Without dead ends: 3252 [2021-07-09 17:34:35,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:34:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-07-09 17:34:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3085. [2021-07-09 17:34:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.0103761348897535) internal successors, (9284), 3084 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9284 transitions. [2021-07-09 17:34:35,147 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9284 transitions. Word has length 22 [2021-07-09 17:34:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:35,147 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9284 transitions. [2021-07-09 17:34:35,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9284 transitions. [2021-07-09 17:34:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:35,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:35,150 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:35,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46810 [2021-07-09 17:34:35,351 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 413 times [2021-07-09 17:34:35,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:35,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273009548] [2021-07-09 17:34:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273009548] [2021-07-09 17:34:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273009548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562496483] [2021-07-09 17:34:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:35,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:34:35,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:35,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:36,022 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:34:36,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:34:36,906 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-07-09 17:34:37,047 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-07-09 17:34:37,217 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 328 [2021-07-09 17:34:37,408 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 401 [2021-07-09 17:34:38,214 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 252 [2021-07-09 17:34:38,380 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-09 17:34:38,545 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-09 17:34:38,734 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 320 [2021-07-09 17:34:40,021 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 217 [2021-07-09 17:34:40,231 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-07-09 17:34:40,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,075 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:34:41,076 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:34:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:34:41,808 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-07-09 17:34:41,928 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-07-09 17:34:42,072 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 257 [2021-07-09 17:34:42,228 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 307 [2021-07-09 17:34:42,502 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 299 [2021-07-09 17:34:43,169 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 322 [2021-07-09 17:34:43,369 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 339 [2021-07-09 17:34:43,514 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 206 [2021-07-09 17:34:44,234 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 251 [2021-07-09 17:34:44,658 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-07-09 17:34:45,063 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-07-09 17:34:45,574 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 483 [2021-07-09 17:34:46,584 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 362 [2021-07-09 17:34:47,486 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 250 [2021-07-09 17:34:47,642 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 257 [2021-07-09 17:34:47,874 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 290 [2021-07-09 17:34:48,197 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-07-09 17:34:48,531 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-07-09 17:34:49,035 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 426 [2021-07-09 17:34:49,365 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 439 [2021-07-09 17:34:50,315 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-07-09 17:34:50,423 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-07-09 17:34:50,544 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 221 [2021-07-09 17:34:50,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:50,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:50,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,793 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:50,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:50,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-07-09 17:34:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562496483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:34:50,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557504172] [2021-07-09 17:34:50,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:34:50,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:34:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:50,826 INFO L87 Difference]: Start difference. First operand 3085 states and 9284 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,423 INFO L93 Difference]: Finished difference Result 3177 states and 9485 transitions. [2021-07-09 17:34:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:34:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:34:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,427 INFO L225 Difference]: With dead ends: 3177 [2021-07-09 17:34:51,427 INFO L226 Difference]: Without dead ends: 3167 [2021-07-09 17:34:51,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 573.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:34:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-07-09 17:34:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3091. [2021-07-09 17:34:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-07-09 17:34:51,463 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-07-09 17:34:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,463 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-07-09 17:34:51,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-07-09 17:34:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:51,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,466 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48443,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,667 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 414 times [2021-07-09 17:34:51,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373861250] [2021-07-09 17:34:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373861250] [2021-07-09 17:34:51,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373861250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506407167] [2021-07-09 17:34:51,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:34:51,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:51,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:52,309 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:34:52,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:52,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-09 17:34:52,881 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 343 [2021-07-09 17:34:53,041 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 350 [2021-07-09 17:34:53,201 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 362 [2021-07-09 17:34:53,968 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-07-09 17:34:54,257 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-07-09 17:34:54,610 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 518 [2021-07-09 17:34:55,300 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 749 [2021-07-09 17:34:55,407 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 495 [2021-07-09 17:34:55,597 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 384 [2021-07-09 17:34:55,861 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 331 [2021-07-09 17:34:56,773 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 290 [2021-07-09 17:34:57,041 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 351 [2021-07-09 17:34:57,961 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 335 [2021-07-09 17:34:58,312 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 417 [2021-07-09 17:34:59,347 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 284 [2021-07-09 17:34:59,521 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 323 [2021-07-09 17:34:59,773 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 346 [2021-07-09 17:35:00,456 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 1065 DAG size of output: 648 [2021-07-09 17:35:01,406 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-07-09 17:35:02,328 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-07-09 17:35:03,323 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 1358 DAG size of output: 735 [2021-07-09 17:35:03,648 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 530 [2021-07-09 17:35:03,930 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 369 [2021-07-09 17:35:04,682 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 300 [2021-07-09 17:35:05,355 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 273 [2021-07-09 17:35:05,632 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-07-09 17:35:05,914 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-07-09 17:35:06,223 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 519 [2021-07-09 17:35:06,435 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 575 [2021-07-09 17:35:06,806 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 374 [2021-07-09 17:35:07,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,649 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-07-09 17:35:07,650 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-07-09 17:35:07,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-07-09 17:35:08,249 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 249 [2021-07-09 17:35:08,893 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 252 [2021-07-09 17:35:09,135 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-07-09 17:35:09,384 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-07-09 17:35:09,694 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 375 [2021-07-09 17:35:10,048 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 420 [2021-07-09 17:35:10,318 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 383 [2021-07-09 17:35:10,725 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 419 [2021-07-09 17:35:11,130 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 410 [2021-07-09 17:35:11,373 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 233 [2021-07-09 17:35:12,137 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 186 [2021-07-09 17:35:12,317 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2021-07-09 17:35:12,426 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 219 [2021-07-09 17:35:12,932 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 202 [2021-07-09 17:35:13,331 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 240 [2021-07-09 17:35:13,743 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 354 [2021-07-09 17:35:14,280 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 417 [2021-07-09 17:35:14,918 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 438 [2021-07-09 17:35:15,304 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 411 [2021-07-09 17:35:15,691 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 402 [2021-07-09 17:35:16,114 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 367 [2021-07-09 17:35:16,960 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 194 [2021-07-09 17:35:17,178 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 261 [2021-07-09 17:35:18,046 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 328 [2021-07-09 17:35:18,480 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 391 [2021-07-09 17:35:19,005 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 412 [2021-07-09 17:35:20,098 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 795 DAG size of output: 621 [2021-07-09 17:35:20,365 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 402 [2021-07-09 17:35:20,796 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 438 [2021-07-09 17:35:21,216 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 429 [2021-07-09 17:35:22,160 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 285 [2021-07-09 17:35:22,403 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 324 [2021-07-09 17:35:22,653 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 309 [2021-07-09 17:35:22,892 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 249 [2021-07-09 17:35:23,063 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 241 [2021-07-09 17:35:23,506 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 241 [2021-07-09 17:35:24,000 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 260 [2021-07-09 17:35:24,162 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 269 [2021-07-09 17:35:24,379 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 277 [2021-07-09 17:35:24,640 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 308 [2021-07-09 17:35:25,017 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 350 [2021-07-09 17:35:25,693 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 506 [2021-07-09 17:35:26,536 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 579 [2021-07-09 17:35:27,527 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 602 [2021-07-09 17:35:27,931 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 426 [2021-07-09 17:35:28,309 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 417 [2021-07-09 17:35:28,739 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 378 [2021-07-09 17:35:29,108 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 385 [2021-07-09 17:35:30,040 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 216 [2021-07-09 17:35:30,245 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 290 [2021-07-09 17:35:30,696 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 458 [2021-07-09 17:35:31,175 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 211 [2021-07-09 17:35:31,291 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 198 [2021-07-09 17:35:31,769 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 226 [2021-07-09 17:35:31,912 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 236 [2021-07-09 17:35:32,204 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 340 [2021-07-09 17:35:32,841 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 713 DAG size of output: 517 [2021-07-09 17:35:33,637 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 593 Received shutdown request... [2021-07-09 17:35:34,569 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 616 [2021-07-09 17:35:36,462 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1211 DAG size of output: 855 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown