/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-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:12:47,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:12:47,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:12:47,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:12:47,535 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 17:12:47,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:12:47,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:12:47,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:12:47,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:12:47,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:12:47,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:12:47,566 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:12:47,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:12:47,566 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:12:47,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:12:47,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:12:47,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:12:47,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:12:47,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:12:47,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:12:47,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:12:47,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:12:47,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:12:47,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:12:47,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:12:47,850 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:12:47,852 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:12:47,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-07-09 17:12:47,852 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-07-09 17:12:47,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:12:47,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:12:47,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:12:47,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:12:47,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:12:47,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:12:47,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:12:47,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:12:47,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:12:47,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/1) ... [2021-07-09 17:12:47,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:12:47,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:12:47,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:12:47,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:12:47,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (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 17:12:47,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:12:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:12:47,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:12:47,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:12:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:12:47,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:12:47,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:12:47,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:12:47,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:12:47,985 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 17:12:48,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:12:48,262 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:12:48,262 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:12:48,263 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:12:48,264 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:12:48 BoogieIcfgContainer [2021-07-09 17:12:48,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:12:48,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:12:48,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:12:48,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:12:48,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:12:47" (1/2) ... [2021-07-09 17:12:48,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d3f597 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:12:48, skipping insertion in model container [2021-07-09 17:12:48,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:12:48" (2/2) ... [2021-07-09 17:12:48,269 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-07-09 17:12:48,274 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:12:48,274 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:12:48,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:12:48,275 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:12:48,321 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:12:48,342 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:12:48,367 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:12:48,367 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:12:48,367 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:12:48,367 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:12:48,367 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:12:48,367 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:12:48,368 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:12:48,368 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:12:48,376 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-09 17:12:48,384 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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 17:12:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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 17:12:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-09 17:12:48,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,390 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,390 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-07-09 17:12:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518839019] [2021-07-09 17:12:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,514 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 17:12:48,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518839019] [2021-07-09 17:12:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518839019] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:12:48,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:12:48,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:12:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822182704] [2021-07-09 17:12:48,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:12:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:48,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:12:48,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:12:48,528 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:48,544 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-09 17:12:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:12:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-07-09 17:12:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:48,550 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:12:48,550 INFO L226 Difference]: Without dead ends: 19 [2021-07-09 17:12:48,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:12:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-09 17:12:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-09 17:12:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 17:12:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-09 17:12:48,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-09 17:12:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,572 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-09 17:12:48,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-09 17:12:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:12:48,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,574 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:12:48,575 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-07-09 17:12:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33068295] [2021-07-09 17:12:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,608 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 17:12:48,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33068295] [2021-07-09 17:12:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33068295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732056132] [2021-07-09 17:12:48,609 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 17:12:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:12:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:48,689 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 17:12:48,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732056132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:48,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 17:12:48,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596988152] [2021-07-09 17:12:48,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:12:48,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:12:48,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:12:48,692 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 17:12:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:48,719 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-09 17:12:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:12:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 10 [2021-07-09 17:12:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:48,720 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:12:48,720 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:12:48,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:12:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:12:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-09 17:12:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 17:12:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-09 17:12:48,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-09 17:12:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,724 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-09 17:12:48,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 17:12:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-09 17:12:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:12:48,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,724 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:12:48,941 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-07-09 17:12:48,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136355557] [2021-07-09 17:12:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,959 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 17:12:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136355557] [2021-07-09 17:12:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136355557] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:12:48,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:12:48,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:12:48,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183073066] [2021-07-09 17:12:48,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:12:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:12:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:12:48,961 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:48,981 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-09 17:12:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:12:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:48,982 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:12:48,982 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:12:48,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:12:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:12:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:12:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 17:12:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-09 17:12:48,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-09 17:12:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,985 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-09 17:12:48,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-09 17:12:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:12:48,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:12:48,986 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-07-09 17:12:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583932042] [2021-07-09 17:12:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,010 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 17:12:49,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583932042] [2021-07-09 17:12:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583932042] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:12:49,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:12:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:12:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461782055] [2021-07-09 17:12:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:12:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:12:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:12:49,012 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:49,033 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-09 17:12:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:12:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:49,034 INFO L225 Difference]: With dead ends: 20 [2021-07-09 17:12:49,034 INFO L226 Difference]: Without dead ends: 20 [2021-07-09 17:12:49,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:12:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-09 17:12:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-09 17:12:49,036 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 17:12:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:12:49,037 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:12:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:49,037 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:12:49,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 17:12:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:12:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:12:49,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:49,038 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:12:49,038 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-07-09 17:12:49,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136308609] [2021-07-09 17:12:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:49,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136308609] [2021-07-09 17:12:49,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136308609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755143642] [2021-07-09 17:12:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:12:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:49,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755143642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:12:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004180081] [2021-07-09 17:12:49,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:12:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:12:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:12:49,144 INFO L87 Difference]: Start difference. First operand 20 states and 35 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 17:12:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:49,161 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-09 17:12:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:12:49,162 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 17:12:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:49,163 INFO L225 Difference]: With dead ends: 24 [2021-07-09 17:12:49,163 INFO L226 Difference]: Without dead ends: 24 [2021-07-09 17:12:49,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:12:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-09 17:12:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-09 17:12:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-09 17:12:49,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-09 17:12:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:49,172 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-09 17:12:49,172 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 17:12:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-09 17:12:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:12:49,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:49,174 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,389 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-07-09 17:12:49,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546307043] [2021-07-09 17:12:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:49,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546307043] [2021-07-09 17:12:49,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546307043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751392767] [2021-07-09 17:12:49,428 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 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 17:12:49,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751392767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:49,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:12:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089701659] [2021-07-09 17:12:49,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:12:49,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:12:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:12:49,505 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:49,537 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:12:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:12:49,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 17:12:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:49,546 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:12:49,546 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:12:49,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:12:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:12:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-09 17:12:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-07-09 17:12:49,549 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-07-09 17:12:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:49,549 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-07-09 17:12:49,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-07-09 17:12:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:12:49,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:49,550 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,751 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-07-09 17:12:49,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718996626] [2021-07-09 17:12:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,788 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 17:12:49,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718996626] [2021-07-09 17:12:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718996626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977778292] [2021-07-09 17:12:49,789 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 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 17:12:49,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:12:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:49,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:49,959 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 17:12:49,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:49,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:49,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:49,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:12:50,018 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 17:12:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977778292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 17:12:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443930790] [2021-07-09 17:12:50,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,019 INFO L87 Difference]: Start difference. First operand 28 states and 51 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 17:12:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:50,067 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-07-09 17:12:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:50,069 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 13 [2021-07-09 17:12:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:50,071 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:12:50,071 INFO L226 Difference]: Without dead ends: 64 [2021-07-09 17:12:50,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-09 17:12:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-07-09 17:12:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-07-09 17:12:50,085 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-07-09 17:12:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:50,085 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-07-09 17:12:50,085 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 17:12:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-07-09 17:12:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:12:50,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:50,086 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:50,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:50,301 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-07-09 17:12:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:50,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564127147] [2021-07-09 17:12:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:50,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564127147] [2021-07-09 17:12:50,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564127147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033868740] [2021-07-09 17:12:50,331 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 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 17:12:50,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:50,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:12:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:50,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:50,453 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 17:12:50,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:50,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:50,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:50,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:12:50,485 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 17:12:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033868740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 17:12:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301554585] [2021-07-09 17:12:50,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,486 INFO L87 Difference]: Start difference. First operand 39 states and 82 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 17:12:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:50,536 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-07-09 17:12:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:50,537 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 13 [2021-07-09 17:12:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:50,537 INFO L225 Difference]: With dead ends: 75 [2021-07-09 17:12:50,537 INFO L226 Difference]: Without dead ends: 72 [2021-07-09 17:12:50,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-09 17:12:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-07-09 17:12:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-07-09 17:12:50,541 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-07-09 17:12:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:50,541 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-07-09 17:12:50,541 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 17:12:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-07-09 17:12:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:12:50,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:50,542 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:50,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:12:50,749 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-07-09 17:12:50,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:50,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584296283] [2021-07-09 17:12:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:50,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:50,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584296283] [2021-07-09 17:12:50,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584296283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349131392] [2021-07-09 17:12:50,787 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 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 17:12:50,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:12:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:12:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:50,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:50,903 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 17:12:50,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:50,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:50,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:50,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:12:50,926 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 17:12:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349131392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 17:12:50,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725189204] [2021-07-09 17:12:50,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,928 INFO L87 Difference]: Start difference. First operand 45 states and 103 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 17:12:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:50,973 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-07-09 17:12:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:50,974 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 13 [2021-07-09 17:12:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:50,974 INFO L225 Difference]: With dead ends: 83 [2021-07-09 17:12:50,975 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:12:50,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:12:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-07-09 17:12:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 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 17:12:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-07-09 17:12:50,978 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-07-09 17:12:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:50,978 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-07-09 17:12:50,978 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 17:12:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-07-09 17:12:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:12:50,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:50,979 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:51,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:51,193 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-07-09 17:12:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:51,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801724] [2021-07-09 17:12:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:51,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801724] [2021-07-09 17:12:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696318434] [2021-07-09 17:12:51,217 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:12:51,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:12:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:51,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:51,321 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 17:12:51,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:51,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:51,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:51,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:12:51,343 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 17:12:51,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696318434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:51,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 17:12:51,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742978917] [2021-07-09 17:12:51,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:51,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:51,344 INFO L87 Difference]: Start difference. First operand 52 states and 127 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 17:12:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:51,387 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-07-09 17:12:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:51,387 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 13 [2021-07-09 17:12:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:51,388 INFO L225 Difference]: With dead ends: 92 [2021-07-09 17:12:51,388 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:12:51,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:12:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-07-09 17:12:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-07-09 17:12:51,392 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-07-09 17:12:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:51,392 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-07-09 17:12:51,392 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 17:12:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-07-09 17:12:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:51,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:51,392 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:51,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:12:51,612 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-07-09 17:12:51,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:51,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672265932] [2021-07-09 17:12:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:51,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672265932] [2021-07-09 17:12:51,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672265932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922161324] [2021-07-09 17:12:51,652 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 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 17:12:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922161324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:51,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:12:51,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493680594] [2021-07-09 17:12:51,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:51,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:51,725 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:51,798 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-07-09 17:12:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-09 17:12:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:51,799 INFO L225 Difference]: With dead ends: 114 [2021-07-09 17:12:51,799 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:12:51,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:12:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-07-09 17:12:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-07-09 17:12:51,815 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-07-09 17:12:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:51,815 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-07-09 17:12:51,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-07-09 17:12:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:51,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:51,819 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:52,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:12:52,033 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-07-09 17:12:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:52,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507904772] [2021-07-09 17:12:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:52,069 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 17:12:52,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507904772] [2021-07-09 17:12:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507904772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981407791] [2021-07-09 17:12:52,069 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 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 17:12:52,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:52,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:52,118 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 17:12:52,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981407791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:52,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:12:52,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479020092] [2021-07-09 17:12:52,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:52,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:52,119 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:52,213 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-07-09 17:12:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:52,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-09 17:12:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:52,214 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:12:52,214 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:12:52,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:12:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-07-09 17:12:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-07-09 17:12:52,217 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-07-09 17:12:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:52,218 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-07-09 17:12:52,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-07-09 17:12:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:52,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:52,218 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:52,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:52,419 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-07-09 17:12:52,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:52,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614535458] [2021-07-09 17:12:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:52,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614535458] [2021-07-09 17:12:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614535458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680375022] [2021-07-09 17:12:52,461 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 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 17:12:52,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:12:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:12:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:52,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680375022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:52,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 17:12:52,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76236975] [2021-07-09 17:12:52,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:52,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:52,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:52,543 INFO L87 Difference]: Start difference. First operand 75 states and 192 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 17:12:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:52,809 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-07-09 17:12:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:12:52,809 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 14 [2021-07-09 17:12:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:52,810 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:12:52,810 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:12:52,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:12:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-07-09 17:12:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-07-09 17:12:52,814 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-07-09 17:12:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:52,814 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-07-09 17:12:52,814 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 17:12:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-07-09 17:12:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:52,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:52,815 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:53,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:53,029 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-07-09 17:12:53,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:53,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24547064] [2021-07-09 17:12:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:53,058 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 17:12:53,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:53,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24547064] [2021-07-09 17:12:53,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24547064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136731478] [2021-07-09 17:12:53,059 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 17:12:53,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:53,117 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 17:12:53,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136731478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:53,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:12:53,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133667679] [2021-07-09 17:12:53,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:12:53,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:53,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:12:53,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:12:53,118 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:53,150 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-07-09 17:12:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:12:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-09 17:12:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:53,151 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:12:53,151 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:12:53,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:12:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-07-09 17:12:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-07-09 17:12:53,155 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-07-09 17:12:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:53,155 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-07-09 17:12:53,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-07-09 17:12:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:53,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:53,155 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:53,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:12:53,369 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-07-09 17:12:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:53,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217504002] [2021-07-09 17:12:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:53,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217504002] [2021-07-09 17:12:53,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217504002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215718126] [2021-07-09 17:12:53,403 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 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 17:12:53,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:12:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:53,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215718126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:53,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:12:53,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846099001] [2021-07-09 17:12:53,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:12:53,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:12:53,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:12:53,452 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:53,509 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-07-09 17:12:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-09 17:12:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:53,510 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:12:53,510 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:12:53,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:12:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-07-09 17:12:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-07-09 17:12:53,513 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-07-09 17:12:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:53,513 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-07-09 17:12:53,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-07-09 17:12:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:53,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:53,514 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:53,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:12:53,729 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-07-09 17:12:53,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:53,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903591693] [2021-07-09 17:12:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:53,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903591693] [2021-07-09 17:12:53,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903591693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838061206] [2021-07-09 17:12:53,775 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 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 17:12:53,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:12:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:53,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:53,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838061206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:53,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:12:53,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439309214] [2021-07-09 17:12:53,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:12:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:12:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:12:53,856 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:53,890 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-07-09 17:12:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:12:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-09 17:12:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:53,891 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:12:53,891 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:12:53,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:12:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-07-09 17:12:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-07-09 17:12:53,895 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-07-09 17:12:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:53,895 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-07-09 17:12:53,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-07-09 17:12:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:53,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:53,895 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:54,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:12:54,097 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:54,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:54,098 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-07-09 17:12:54,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:54,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377625885] [2021-07-09 17:12:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:54,128 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 17:12:54,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:54,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377625885] [2021-07-09 17:12:54,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377625885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853284468] [2021-07-09 17:12:54,128 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 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 17:12:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:54,197 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 17:12:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853284468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:54,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:12:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287425121] [2021-07-09 17:12:54,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:54,198 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:54,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:54,249 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-07-09 17:12:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-09 17:12:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:54,250 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:12:54,250 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:12:54,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:12:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-07-09 17:12:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-07-09 17:12:54,253 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-07-09 17:12:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-07-09 17:12:54,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-07-09 17:12:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:54,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:54,254 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:54,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:54,454 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-07-09 17:12:54,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:54,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347182454] [2021-07-09 17:12:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:54,486 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 17:12:54,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:54,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347182454] [2021-07-09 17:12:54,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347182454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100476033] [2021-07-09 17:12:54,486 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 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 17:12:54,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:54,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100476033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:54,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:12:54,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801510253] [2021-07-09 17:12:54,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:12:54,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:12:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:12:54,544 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:54,605 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-07-09 17:12:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-09 17:12:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:54,606 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:12:54,606 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:12:54,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:12:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-07-09 17:12:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-09 17:12:54,609 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-09 17:12:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:54,609 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-09 17:12:54,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-09 17:12:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:54,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:54,610 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:54,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:12:54,810 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-07-09 17:12:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:54,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830519559] [2021-07-09 17:12:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:54,844 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 17:12:54,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:54,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830519559] [2021-07-09 17:12:54,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830519559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230661069] [2021-07-09 17:12:54,844 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 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 17:12:54,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:54,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230661069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:12:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634427955] [2021-07-09 17:12:54,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:12:54,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:12:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:12:54,895 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:54,924 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-07-09 17:12:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:12:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-09 17:12:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:54,925 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:12:54,925 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 17:12:54,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 17:12:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-07-09 17:12:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-09 17:12:54,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-09 17:12:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:54,928 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-09 17:12:54,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 17:12:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-09 17:12:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:54,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:54,929 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:55,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:55,133 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-07-09 17:12:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:55,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347841743] [2021-07-09 17:12:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:55,162 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 17:12:55,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:55,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347841743] [2021-07-09 17:12:55,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347841743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770506982] [2021-07-09 17:12:55,162 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 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 17:12:55,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:55,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770506982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:55,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:12:55,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935356689] [2021-07-09 17:12:55,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:55,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:55,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:55,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:55,238 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:55,299 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-07-09 17:12:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-09 17:12:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:55,300 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:12:55,300 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:12:55,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:12:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-07-09 17:12:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-09 17:12:55,304 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-09 17:12:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:55,304 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-09 17:12:55,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-09 17:12:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:55,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:55,304 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:55,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:12:55,521 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-07-09 17:12:55,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:55,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897745216] [2021-07-09 17:12:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:55,556 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 17:12:55,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897745216] [2021-07-09 17:12:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897745216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908351389] [2021-07-09 17:12:55,557 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 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 17:12:55,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:12:55,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:55,638 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 17:12:55,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908351389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:55,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:12:55,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942316195] [2021-07-09 17:12:55,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:55,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:55,640 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:55,719 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-07-09 17:12:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-09 17:12:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:55,721 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:12:55,721 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:12:55,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:12:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-07-09 17:12:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-07-09 17:12:55,724 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-07-09 17:12:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:55,724 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-07-09 17:12:55,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 17:12:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-07-09 17:12:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:55,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:55,725 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:55,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:12:55,937 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-07-09 17:12:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:55,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235950549] [2021-07-09 17:12:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:55,976 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 17:12:55,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235950549] [2021-07-09 17:12:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235950549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512106435] [2021-07-09 17:12:55,976 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 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 17:12:56,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:56,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:56,048 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 17:12:56,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512106435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:56,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 17:12:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276608298] [2021-07-09 17:12:56,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:56,049 INFO L87 Difference]: Start difference. First operand 132 states and 359 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 17:12:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:56,118 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-07-09 17:12:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:56,119 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 14 [2021-07-09 17:12:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:56,119 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:12:56,120 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:12:56,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:12:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-07-09 17:12:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-07-09 17:12:56,123 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-07-09 17:12:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:56,124 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-07-09 17:12:56,124 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 17:12:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-07-09 17:12:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:56,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:56,124 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:56,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:56,341 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-07-09 17:12:56,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:56,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167180871] [2021-07-09 17:12:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:56,379 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 17:12:56,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:56,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167180871] [2021-07-09 17:12:56,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167180871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008810652] [2021-07-09 17:12:56,380 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 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 17:12:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:56,443 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 17:12:56,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008810652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:56,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 17:12:56,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155849466] [2021-07-09 17:12:56,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:56,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:56,445 INFO L87 Difference]: Start difference. First operand 151 states and 420 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 17:12:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:56,499 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-07-09 17:12:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:56,500 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 14 [2021-07-09 17:12:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:56,500 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:12:56,501 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:12:56,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:12:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-07-09 17:12:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-07-09 17:12:56,504 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-07-09 17:12:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:56,504 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-07-09 17:12:56,504 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 17:12:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-07-09 17:12:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:56,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:56,505 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:56,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:12:56,721 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-07-09 17:12:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:56,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541172447] [2021-07-09 17:12:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:56,752 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 17:12:56,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541172447] [2021-07-09 17:12:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541172447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686339092] [2021-07-09 17:12:56,753 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 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 17:12:56,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:56,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:56,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:56,825 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 17:12:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686339092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:56,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:12:56,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692690984] [2021-07-09 17:12:56,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:56,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:56,826 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:12:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:56,922 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-07-09 17:12:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14 [2021-07-09 17:12:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:56,924 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:12:56,924 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:12:56,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:12:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-07-09 17:12:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-07-09 17:12:56,927 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-07-09 17:12:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-07-09 17:12:56,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:12:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-07-09 17:12:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:56,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:56,928 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:57,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:12:57,129 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-07-09 17:12:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145633924] [2021-07-09 17:12:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:57,166 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 17:12:57,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145633924] [2021-07-09 17:12:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145633924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963649567] [2021-07-09 17:12:57,167 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 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 17:12:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:57,240 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 17:12:57,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963649567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:57,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:12:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913209524] [2021-07-09 17:12:57,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:57,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:57,241 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:12:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:57,313 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-07-09 17:12:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14 [2021-07-09 17:12:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:57,314 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:12:57,314 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:12:57,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:12:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-07-09 17:12:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 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 17:12:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-07-09 17:12:57,317 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-07-09 17:12:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:57,317 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-07-09 17:12:57,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:12:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-07-09 17:12:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:12:57,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:57,318 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:57,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:57,534 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-07-09 17:12:57,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:57,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134429279] [2021-07-09 17:12:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:57,577 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 17:12:57,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134429279] [2021-07-09 17:12:57,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134429279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153966666] [2021-07-09 17:12:57,577 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 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 17:12:57,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:57,646 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 17:12:57,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153966666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:57,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:12:57,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648611562] [2021-07-09 17:12:57,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:57,647 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:12:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:57,772 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-07-09 17:12:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 14 [2021-07-09 17:12:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:57,773 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:12:57,773 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:12:57,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:12:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-07-09 17:12:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 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 17:12:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-07-09 17:12:57,776 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-07-09 17:12:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:57,776 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-07-09 17:12:57,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:12:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-07-09 17:12:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:57,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:57,777 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:12:57,985 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-07-09 17:12:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599299418] [2021-07-09 17:12:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:58,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:58,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599299418] [2021-07-09 17:12:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599299418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846915275] [2021-07-09 17:12:58,013 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 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 17:12:58,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:58,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846915275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:58,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 17:12:58,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166093821] [2021-07-09 17:12:58,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:58,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:58,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:58,079 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 17:12:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:58,119 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-07-09 17:12:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:12:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-07-09 17:12:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:58,120 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:12:58,120 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:12:58,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:12:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-07-09 17:12:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-07-09 17:12:58,124 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-07-09 17:12:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:58,124 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-07-09 17:12:58,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 17:12:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-07-09 17:12:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:58,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:58,125 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:58,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:58,341 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-07-09 17:12:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786877889] [2021-07-09 17:12:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786877889] [2021-07-09 17:12:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786877889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938082828] [2021-07-09 17:12:58,376 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 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 17:12:58,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:58,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938082828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:58,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-07-09 17:12:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176649235] [2021-07-09 17:12:58,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:58,435 INFO L87 Difference]: Start difference. First operand 146 states and 398 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 17:12:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:58,507 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-07-09 17:12:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:58,507 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 15 [2021-07-09 17:12:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:58,508 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:12:58,508 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:12:58,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:12:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-07-09 17:12:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-07-09 17:12:58,511 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-07-09 17:12:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:58,511 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-07-09 17:12:58,511 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 17:12:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-07-09 17:12:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:58,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:58,512 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:58,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:12:58,725 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-07-09 17:12:58,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:58,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230025496] [2021-07-09 17:12:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:58,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230025496] [2021-07-09 17:12:58,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230025496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44618745] [2021-07-09 17:12:58,758 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 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 17:12:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:58,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44618745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:58,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-09 17:12:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784213303] [2021-07-09 17:12:58,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:58,806 INFO L87 Difference]: Start difference. First operand 146 states and 396 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 17:12:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:58,875 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-07-09 17:12:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:58,875 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 15 [2021-07-09 17:12:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:58,876 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:12:58,876 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:12:58,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:12:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-07-09 17:12:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-07-09 17:12:58,880 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-07-09 17:12:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-07-09 17:12:58,880 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 17:12:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-07-09 17:12:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:58,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:58,882 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:59,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:12:59,097 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-07-09 17:12:59,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:59,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846851770] [2021-07-09 17:12:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:59,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:59,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846851770] [2021-07-09 17:12:59,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846851770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118362563] [2021-07-09 17:12:59,124 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:12:59,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:59,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118362563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:59,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 17:12:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913087533] [2021-07-09 17:12:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:59,184 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 17:12:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:59,229 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-07-09 17:12:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:12:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-07-09 17:12:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:59,230 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:12:59,230 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:12:59,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:12:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-07-09 17:12:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-07-09 17:12:59,234 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-07-09 17:12:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:59,234 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-07-09 17:12:59,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 17:12:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-07-09 17:12:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:59,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:59,235 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:59,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 17:12:59,451 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-07-09 17:12:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:59,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412412479] [2021-07-09 17:12:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:59,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:59,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412412479] [2021-07-09 17:12:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412412479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325090336] [2021-07-09 17:12:59,483 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 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 17:12:59,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:59,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:12:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:59,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325090336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:59,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:12:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308920612] [2021-07-09 17:12:59,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:59,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:59,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:59,535 INFO L87 Difference]: Start difference. First operand 151 states and 410 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 17:12:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:59,593 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-07-09 17:12:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:59,593 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 15 [2021-07-09 17:12:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:59,594 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:12:59,594 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:12:59,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:12:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-07-09 17:12:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-07-09 17:12:59,597 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-07-09 17:12:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:59,597 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-07-09 17:12:59,597 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 17:12:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-07-09 17:12:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:12:59,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:59,598 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:59,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:59,809 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:59,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-07-09 17:12:59,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:59,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463600287] [2021-07-09 17:12:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:59,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:59,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463600287] [2021-07-09 17:12:59,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463600287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941974628] [2021-07-09 17:12:59,847 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 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 17:12:59,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:59,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:12:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941974628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-09 17:12:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799321118] [2021-07-09 17:12:59,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:59,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:59,912 INFO L87 Difference]: Start difference. First operand 151 states and 408 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 17:12:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:59,996 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-07-09 17:13:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:00,001 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 15 [2021-07-09 17:13:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:00,002 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:13:00,002 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:13:00,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:13:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-07-09 17:13:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-07-09 17:13:00,006 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-07-09 17:13:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:00,006 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-07-09 17:13:00,007 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 17:13:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-07-09 17:13:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:00,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:00,007 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:00,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:13:00,223 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:00,224 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-07-09 17:13:00,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:00,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743932962] [2021-07-09 17:13:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:00,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743932962] [2021-07-09 17:13:00,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743932962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329526496] [2021-07-09 17:13:00,264 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 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 17:13:00,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:00,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329526496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:00,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-09 17:13:00,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466571286] [2021-07-09 17:13:00,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:00,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:00,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:00,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:00,321 INFO L87 Difference]: Start difference. First operand 151 states and 407 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 17:13:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:00,377 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-07-09 17:13:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:00,377 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 15 [2021-07-09 17:13:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:00,378 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:13:00,378 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:13:00,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:13:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-07-09 17:13:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-07-09 17:13:00,383 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-07-09 17:13:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:00,384 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-07-09 17:13:00,384 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 17:13:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-07-09 17:13:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:00,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:00,384 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:00,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:00,593 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-07-09 17:13:00,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:00,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530682705] [2021-07-09 17:13:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:00,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:00,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530682705] [2021-07-09 17:13:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530682705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901228795] [2021-07-09 17:13:00,632 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 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 17:13:00,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:00,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901228795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:00,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-07-09 17:13:00,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086513626] [2021-07-09 17:13:00,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:00,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:00,689 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 17:13:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:00,741 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-07-09 17:13:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 15 [2021-07-09 17:13:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:00,742 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:13:00,742 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:13:00,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:13:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-07-09 17:13:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-07-09 17:13:00,746 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-07-09 17:13:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:00,746 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-07-09 17:13:00,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 17:13:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-07-09 17:13:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:00,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:00,747 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:00,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:13:00,965 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-07-09 17:13:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:00,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46347747] [2021-07-09 17:13:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:00,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:00,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46347747] [2021-07-09 17:13:00,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46347747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516526436] [2021-07-09 17:13:00,997 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 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 17:13:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:01,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:01,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516526436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:01,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-07-09 17:13:01,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342786270] [2021-07-09 17:13:01,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:01,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:01,043 INFO L87 Difference]: Start difference. First operand 175 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:01,098 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-07-09 17:13:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:13:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:01,099 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:13:01,099 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:13:01,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:13:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-07-09 17:13:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-07-09 17:13:01,103 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-07-09 17:13:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:01,103 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-07-09 17:13:01,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-07-09 17:13:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:01,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:01,103 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:01,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:13:01,317 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-07-09 17:13:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397817907] [2021-07-09 17:13:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:01,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397817907] [2021-07-09 17:13:01,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397817907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881844458] [2021-07-09 17:13:01,352 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 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 17:13:01,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881844458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:01,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 17:13:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091261662] [2021-07-09 17:13:01,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:01,413 INFO L87 Difference]: Start difference. First operand 175 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:01,485 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-07-09 17:13:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:13:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:01,486 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:13:01,486 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:13:01,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:13:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-07-09 17:13:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-07-09 17:13:01,490 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-07-09 17:13:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:01,490 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-07-09 17:13:01,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-07-09 17:13:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:01,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:01,490 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:01,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:13:01,705 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-07-09 17:13:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:01,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547086341] [2021-07-09 17:13:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:01,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547086341] [2021-07-09 17:13:01,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547086341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669487569] [2021-07-09 17:13:01,740 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 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 17:13:01,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:13:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669487569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 17:13:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037923341] [2021-07-09 17:13:01,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:01,798 INFO L87 Difference]: Start difference. First operand 179 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:01,860 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-07-09 17:13:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:13:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:01,861 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:13:01,861 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:13:01,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:13:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-07-09 17:13:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-07-09 17:13:01,864 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-07-09 17:13:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:01,864 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-07-09 17:13:01,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,864 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-07-09 17:13:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:13:01,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:01,865 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:02,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:13:02,080 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:02,081 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-07-09 17:13:02,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:02,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077214936] [2021-07-09 17:13:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:02,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:02,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077214936] [2021-07-09 17:13:02,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077214936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974502285] [2021-07-09 17:13:02,119 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 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 17:13:02,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:13:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974502285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:02,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 17:13:02,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761476590] [2021-07-09 17:13:02,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:02,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:02,182 INFO L87 Difference]: Start difference. First operand 179 states and 505 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 17:13:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:02,251 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-07-09 17:13:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:02,251 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 15 [2021-07-09 17:13:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:02,252 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:13:02,252 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:13:02,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:13:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-07-09 17:13:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-07-09 17:13:02,255 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-07-09 17:13:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:02,256 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-07-09 17:13:02,256 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 17:13:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-07-09 17:13:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:13:02,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:02,256 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:02,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:13:02,472 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-07-09 17:13:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:02,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654444094] [2021-07-09 17:13:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:02,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654444094] [2021-07-09 17:13:02,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654444094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11051156] [2021-07-09 17:13:02,530 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 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 17:13:02,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:02,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:02,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:13:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:02,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11051156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:02,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:13:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692559470] [2021-07-09 17:13:02,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:02,602 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:02,688 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-07-09 17:13:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 16 [2021-07-09 17:13:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:02,689 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:13:02,690 INFO L226 Difference]: Without dead ends: 448 [2021-07-09 17:13:02,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-09 17:13:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-07-09 17:13:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-07-09 17:13:02,694 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-07-09 17:13:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:02,694 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-07-09 17:13:02,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-07-09 17:13:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:02,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:02,695 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:02,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:13:02,896 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-07-09 17:13:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:02,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461326836] [2021-07-09 17:13:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:02,934 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 17:13:02,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461326836] [2021-07-09 17:13:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461326836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614244269] [2021-07-09 17:13:02,935 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 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 17:13:02,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:13:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:03,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:03,126 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 17:13:03,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:03,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:03,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:03,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:03,348 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 17:13:03,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614244269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:03,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:03,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253726732] [2021-07-09 17:13:03,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:03,349 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:03,439 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-07-09 17:13:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:13:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:03,440 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:13:03,440 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 17:13:03,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 17:13:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-07-09 17:13:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-07-09 17:13:03,445 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-07-09 17:13:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:03,445 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-07-09 17:13:03,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-07-09 17:13:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:03,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:03,446 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 17:13:03,657 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-07-09 17:13:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574528294] [2021-07-09 17:13:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:03,704 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 17:13:03,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574528294] [2021-07-09 17:13:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574528294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198055473] [2021-07-09 17:13:03,705 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 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 17:13:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:03,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:03,919 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 17:13:04,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:04,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:04,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:04,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:04,069 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 17:13:04,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198055473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:04,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:04,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019874515] [2021-07-09 17:13:04,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:04,070 INFO L87 Difference]: Start difference. First operand 284 states and 776 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 17:13:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:04,175 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-07-09 17:13:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:04,175 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 17 [2021-07-09 17:13:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:04,176 INFO L225 Difference]: With dead ends: 363 [2021-07-09 17:13:04,176 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:13:04,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:13:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-07-09 17:13:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-07-09 17:13:04,182 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-07-09 17:13:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:04,182 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-07-09 17:13:04,182 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 17:13:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-07-09 17:13:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:04,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:04,183 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:04,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:04,397 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-07-09 17:13:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973563312] [2021-07-09 17:13:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:04,435 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 17:13:04,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973563312] [2021-07-09 17:13:04,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973563312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970501856] [2021-07-09 17:13:04,435 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 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 17:13:04,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:04,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:04,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:04,608 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 17:13:04,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:04,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:04,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:04,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:04,840 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 17:13:04,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970501856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:04,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324511080] [2021-07-09 17:13:04,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:04,841 INFO L87 Difference]: Start difference. First operand 326 states and 899 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 17:13:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:04,919 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-07-09 17:13:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:04,919 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 17 [2021-07-09 17:13:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:04,921 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:13:04,921 INFO L226 Difference]: Without dead ends: 408 [2021-07-09 17:13:04,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-09 17:13:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-07-09 17:13:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-07-09 17:13:04,926 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-07-09 17:13:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:04,927 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-07-09 17:13:04,927 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 17:13:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-07-09 17:13:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:04,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:04,927 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:05,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:13:05,144 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-07-09 17:13:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:05,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366281244] [2021-07-09 17:13:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:05,179 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 17:13:05,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:05,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366281244] [2021-07-09 17:13:05,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366281244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:05,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500294162] [2021-07-09 17:13:05,180 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 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 17:13:05,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:05,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:05,356 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 17:13:05,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:05,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:05,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:05,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:05,547 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 17:13:05,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500294162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:05,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:05,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:05,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010132174] [2021-07-09 17:13:05,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:05,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:05,548 INFO L87 Difference]: Start difference. First operand 370 states and 1035 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 17:13:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:05,662 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-07-09 17:13:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:05,663 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 17 [2021-07-09 17:13:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:05,664 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:13:05,664 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:13:05,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:13:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-07-09 17:13:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-07-09 17:13:05,671 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-07-09 17:13:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:05,671 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-07-09 17:13:05,671 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 17:13:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-07-09 17:13:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:05,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:05,672 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:05,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:05,885 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-07-09 17:13:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:05,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473139413] [2021-07-09 17:13:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:05,924 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 17:13:05,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:05,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473139413] [2021-07-09 17:13:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473139413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:05,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529427922] [2021-07-09 17:13:05,925 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 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 17:13:05,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:05,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:05,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:06,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:06,129 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 17:13:06,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:06,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:06,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:06,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:06,267 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 17:13:06,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529427922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:06,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:06,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157218336] [2021-07-09 17:13:06,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:06,269 INFO L87 Difference]: Start difference. First operand 421 states and 1197 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 17:13:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:06,350 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-07-09 17:13:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:06,351 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 17 [2021-07-09 17:13:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:06,352 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:13:06,352 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:13:06,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:13:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-07-09 17:13:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-07-09 17:13:06,360 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-07-09 17:13:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:06,360 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-07-09 17:13:06,360 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 17:13:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-07-09 17:13:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:06,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:06,361 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:06,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 17:13:06,577 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-07-09 17:13:06,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:06,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477396745] [2021-07-09 17:13:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:06,612 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 17:13:06,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:06,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477396745] [2021-07-09 17:13:06,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477396745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536680627] [2021-07-09 17:13:06,612 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 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 17:13:06,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:06,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:06,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:06,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:06,771 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 17:13:06,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:06,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:06,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:06,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:06,954 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 17:13:06,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536680627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:06,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:06,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192439421] [2021-07-09 17:13:06,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:06,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:06,955 INFO L87 Difference]: Start difference. First operand 462 states and 1324 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 17:13:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:07,052 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-07-09 17:13:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:07,053 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 17 [2021-07-09 17:13:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:07,054 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:13:07,054 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:13:07,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:13:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-07-09 17:13:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-07-09 17:13:07,062 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-07-09 17:13:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:07,062 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-07-09 17:13:07,062 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 17:13:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-07-09 17:13:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:13:07,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:07,063 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:07,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:07,269 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-07-09 17:13:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:07,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449875478] [2021-07-09 17:13:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:07,306 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 17:13:07,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449875478] [2021-07-09 17:13:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449875478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996814699] [2021-07-09 17:13:07,306 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 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 17:13:07,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:07,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:13:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:07,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:07,491 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 17:13:07,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:07,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:07,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:07,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:13:07,628 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 17:13:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996814699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:07,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:07,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:13:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66329607] [2021-07-09 17:13:07,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:07,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:07,629 INFO L87 Difference]: Start difference. First operand 497 states and 1433 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 17:13:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:07,751 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-07-09 17:13:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:07,752 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 17 [2021-07-09 17:13:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:07,754 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:13:07,754 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 17:13:07,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 17:13:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-07-09 17:13:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-07-09 17:13:07,762 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-07-09 17:13:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:07,762 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-07-09 17:13:07,762 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 17:13:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-07-09 17:13:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:07,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:07,763 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:07,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:07,979 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-07-09 17:13:07,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:07,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552425551] [2021-07-09 17:13:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:08,037 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 17:13:08,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552425551] [2021-07-09 17:13:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552425551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586321209] [2021-07-09 17:13:08,038 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 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 17:13:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:08,097 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 17:13:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586321209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:08,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:08,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550413824] [2021-07-09 17:13:08,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:08,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:08,098 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:08,276 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-07-09 17:13:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:13:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:08,278 INFO L225 Difference]: With dead ends: 696 [2021-07-09 17:13:08,278 INFO L226 Difference]: Without dead ends: 689 [2021-07-09 17:13:08,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:13:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-09 17:13:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-07-09 17:13:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-07-09 17:13:08,287 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-07-09 17:13:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:08,288 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-07-09 17:13:08,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-07-09 17:13:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:08,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:08,289 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:08,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-09 17:13:08,501 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-07-09 17:13:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:08,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42607715] [2021-07-09 17:13:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:08,545 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 17:13:08,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42607715] [2021-07-09 17:13:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42607715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274722389] [2021-07-09 17:13:08,546 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 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 17:13:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:08,598 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 17:13:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274722389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50355150] [2021-07-09 17:13:08,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:08,599 INFO L87 Difference]: Start difference. First operand 549 states and 1593 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 17:13:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:08,642 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-07-09 17:13:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:08,643 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 18 [2021-07-09 17:13:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:08,645 INFO L225 Difference]: With dead ends: 706 [2021-07-09 17:13:08,645 INFO L226 Difference]: Without dead ends: 706 [2021-07-09 17:13:08,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-09 17:13:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-07-09 17:13:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-07-09 17:13:08,654 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-07-09 17:13:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:08,654 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-07-09 17:13:08,655 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 17:13:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-07-09 17:13:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:08,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:08,655 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:08,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:08,857 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-07-09 17:13:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533654844] [2021-07-09 17:13:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:08,893 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 17:13:08,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533654844] [2021-07-09 17:13:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533654844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921185770] [2021-07-09 17:13:08,894 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 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 17:13:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921185770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:08,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861765882] [2021-07-09 17:13:08,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:08,951 INFO L87 Difference]: Start difference. First operand 525 states and 1513 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 17:13:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:09,053 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-07-09 17:13:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:09,053 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 18 [2021-07-09 17:13:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:09,055 INFO L225 Difference]: With dead ends: 683 [2021-07-09 17:13:09,056 INFO L226 Difference]: Without dead ends: 681 [2021-07-09 17:13:09,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-09 17:13:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-07-09 17:13:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-07-09 17:13:09,066 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-07-09 17:13:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-07-09 17:13:09,066 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 17:13:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-07-09 17:13:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:09,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:09,067 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:09,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-09 17:13:09,283 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-07-09 17:13:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:09,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274527263] [2021-07-09 17:13:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:09,327 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 17:13:09,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274527263] [2021-07-09 17:13:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274527263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247800662] [2021-07-09 17:13:09,327 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 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 17:13:09,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:09,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247800662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:09,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287063524] [2021-07-09 17:13:09,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:09,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:09,379 INFO L87 Difference]: Start difference. First operand 547 states and 1581 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 17:13:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:09,423 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-07-09 17:13:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:09,424 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 18 [2021-07-09 17:13:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:09,426 INFO L225 Difference]: With dead ends: 721 [2021-07-09 17:13:09,426 INFO L226 Difference]: Without dead ends: 721 [2021-07-09 17:13:09,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-09 17:13:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-07-09 17:13:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-07-09 17:13:09,437 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-07-09 17:13:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:09,437 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-07-09 17:13:09,437 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 17:13:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-07-09 17:13:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:09,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:09,438 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 17:13:09,657 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-07-09 17:13:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593723573] [2021-07-09 17:13:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:09,697 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 17:13:09,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:09,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593723573] [2021-07-09 17:13:09,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593723573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192134120] [2021-07-09 17:13:09,698 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 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 17:13:09,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:09,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:09,756 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 17:13:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192134120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:09,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:09,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821904930] [2021-07-09 17:13:09,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:09,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:09,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:09,757 INFO L87 Difference]: Start difference. First operand 548 states and 1584 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:09,829 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-07-09 17:13:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:09,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:09,833 INFO L225 Difference]: With dead ends: 777 [2021-07-09 17:13:09,833 INFO L226 Difference]: Without dead ends: 777 [2021-07-09 17:13:09,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-07-09 17:13:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-07-09 17:13:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-07-09 17:13:09,843 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-07-09 17:13:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:09,843 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-07-09 17:13:09,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-07-09 17:13:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:09,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:09,844 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:10,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-09 17:13:10,058 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-07-09 17:13:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:10,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194036005] [2021-07-09 17:13:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:10,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:10,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194036005] [2021-07-09 17:13:10,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194036005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817330986] [2021-07-09 17:13:10,097 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 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 17:13:10,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817330986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:10,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:10,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646461108] [2021-07-09 17:13:10,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:10,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:10,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:10,151 INFO L87 Difference]: Start difference. First operand 523 states and 1501 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 17:13:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:10,252 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-07-09 17:13:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:10,252 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 18 [2021-07-09 17:13:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:10,254 INFO L225 Difference]: With dead ends: 678 [2021-07-09 17:13:10,254 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:13:10,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:13:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-07-09 17:13:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-07-09 17:13:10,263 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-07-09 17:13:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:10,264 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-07-09 17:13:10,264 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 17:13:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-07-09 17:13:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:10,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:10,265 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:10,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-07-09 17:13:10,477 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-07-09 17:13:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:10,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639963789] [2021-07-09 17:13:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,514 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 17:13:10,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639963789] [2021-07-09 17:13:10,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639963789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103946129] [2021-07-09 17:13:10,514 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 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 17:13:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:10,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103946129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:10,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927691571] [2021-07-09 17:13:10,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:10,574 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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 17:13:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:10,616 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-07-09 17:13:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:10,617 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 18 [2021-07-09 17:13:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:10,619 INFO L225 Difference]: With dead ends: 708 [2021-07-09 17:13:10,619 INFO L226 Difference]: Without dead ends: 708 [2021-07-09 17:13:10,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-07-09 17:13:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-07-09 17:13:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-07-09 17:13:10,628 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-07-09 17:13:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:10,628 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-07-09 17:13:10,628 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 17:13:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-07-09 17:13:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:10,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:10,629 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:10,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:10,845 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-07-09 17:13:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:10,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615509743] [2021-07-09 17:13:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,882 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 17:13:10,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615509743] [2021-07-09 17:13:10,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615509743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774119316] [2021-07-09 17:13:10,883 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 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 17:13:10,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:10,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:10,951 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 17:13:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774119316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:10,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202313285] [2021-07-09 17:13:10,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:10,952 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:11,016 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-07-09 17:13:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:11,018 INFO L225 Difference]: With dead ends: 767 [2021-07-09 17:13:11,018 INFO L226 Difference]: Without dead ends: 767 [2021-07-09 17:13:11,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-07-09 17:13:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-07-09 17:13:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-07-09 17:13:11,028 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-07-09 17:13:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:11,028 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-07-09 17:13:11,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-07-09 17:13:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:11,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:11,029 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:11,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-09 17:13:11,244 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-07-09 17:13:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524900866] [2021-07-09 17:13:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:11,282 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 17:13:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524900866] [2021-07-09 17:13:11,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524900866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049954464] [2021-07-09 17:13:11,283 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 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 17:13:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:11,352 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 17:13:11,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049954464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:11,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:11,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:11,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933172406] [2021-07-09 17:13:11,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:11,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:11,353 INFO L87 Difference]: Start difference. First operand 520 states and 1484 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:11,438 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-07-09 17:13:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:11,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:11,443 INFO L225 Difference]: With dead ends: 976 [2021-07-09 17:13:11,443 INFO L226 Difference]: Without dead ends: 976 [2021-07-09 17:13:11,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-09 17:13:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-07-09 17:13:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-07-09 17:13:11,454 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-07-09 17:13:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:11,454 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-07-09 17:13:11,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-07-09 17:13:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:11,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:11,455 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:11,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:11,672 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-07-09 17:13:11,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:11,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749987952] [2021-07-09 17:13:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:11,708 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 17:13:11,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:11,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749987952] [2021-07-09 17:13:11,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749987952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:11,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551749314] [2021-07-09 17:13:11,709 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 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 17:13:11,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:11,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551749314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:11,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:11,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947194198] [2021-07-09 17:13:11,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:11,763 INFO L87 Difference]: Start difference. First operand 701 states and 2056 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 17:13:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:11,857 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-07-09 17:13:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:11,857 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 18 [2021-07-09 17:13:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:11,860 INFO L225 Difference]: With dead ends: 888 [2021-07-09 17:13:11,860 INFO L226 Difference]: Without dead ends: 886 [2021-07-09 17:13:11,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-07-09 17:13:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-07-09 17:13:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-07-09 17:13:11,873 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-07-09 17:13:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:11,873 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-07-09 17:13:11,873 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 17:13:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-07-09 17:13:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:11,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:11,874 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:12,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-07-09 17:13:12,089 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-07-09 17:13:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080494789] [2021-07-09 17:13:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:12,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:12,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080494789] [2021-07-09 17:13:12,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080494789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44444336] [2021-07-09 17:13:12,126 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 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 17:13:12,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44444336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533275327] [2021-07-09 17:13:12,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:12,179 INFO L87 Difference]: Start difference. First operand 764 states and 2246 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 17:13:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:12,220 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-07-09 17:13:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:12,220 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 18 [2021-07-09 17:13:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:12,237 INFO L225 Difference]: With dead ends: 882 [2021-07-09 17:13:12,237 INFO L226 Difference]: Without dead ends: 882 [2021-07-09 17:13:12,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-09 17:13:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-07-09 17:13:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-07-09 17:13:12,249 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-07-09 17:13:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:12,250 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-07-09 17:13:12,250 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 17:13:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-07-09 17:13:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:12,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:12,251 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:12,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-09 17:13:12,461 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-07-09 17:13:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:12,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603981581] [2021-07-09 17:13:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:12,505 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 17:13:12,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603981581] [2021-07-09 17:13:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603981581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125780441] [2021-07-09 17:13:12,505 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 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 17:13:12,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:12,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:12,565 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 17:13:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125780441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:12,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376848888] [2021-07-09 17:13:12,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:12,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:12,566 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:12,625 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-07-09 17:13:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:12,627 INFO L225 Difference]: With dead ends: 936 [2021-07-09 17:13:12,627 INFO L226 Difference]: Without dead ends: 936 [2021-07-09 17:13:12,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-09 17:13:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-07-09 17:13:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-07-09 17:13:12,646 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-07-09 17:13:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:12,646 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-07-09 17:13:12,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-07-09 17:13:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:12,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:12,647 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:12,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:12,853 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-07-09 17:13:12,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:12,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941815297] [2021-07-09 17:13:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:12,892 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 17:13:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941815297] [2021-07-09 17:13:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941815297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086628132] [2021-07-09 17:13:12,893 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 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 17:13:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:12,957 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 17:13:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086628132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:12,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:12,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692670265] [2021-07-09 17:13:12,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:12,958 INFO L87 Difference]: Start difference. First operand 710 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:13,016 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-07-09 17:13:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:13,018 INFO L225 Difference]: With dead ends: 1110 [2021-07-09 17:13:13,019 INFO L226 Difference]: Without dead ends: 1110 [2021-07-09 17:13:13,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-09 17:13:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-07-09 17:13:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-07-09 17:13:13,033 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-07-09 17:13:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:13,033 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-07-09 17:13:13,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-07-09 17:13:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:13,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:13,034 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:13,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 17:13:13,241 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-07-09 17:13:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527292637] [2021-07-09 17:13:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:13,291 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 17:13:13,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527292637] [2021-07-09 17:13:13,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527292637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366122110] [2021-07-09 17:13:13,292 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 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 17:13:13,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:13,351 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 17:13:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366122110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506680563] [2021-07-09 17:13:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:13,352 INFO L87 Difference]: Start difference. First operand 950 states and 2822 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:13,464 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-07-09 17:13:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:13,466 INFO L225 Difference]: With dead ends: 1384 [2021-07-09 17:13:13,466 INFO L226 Difference]: Without dead ends: 1384 [2021-07-09 17:13:13,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-07-09 17:13:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-07-09 17:13:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-07-09 17:13:13,487 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-07-09 17:13:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:13,487 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-07-09 17:13:13,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-07-09 17:13:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:13,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:13,489 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:13,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:13,704 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-07-09 17:13:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:13,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480417739] [2021-07-09 17:13:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:13,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480417739] [2021-07-09 17:13:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480417739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:13,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113783119] [2021-07-09 17:13:13,741 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 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 17:13:13,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:13,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113783119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:13,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:13,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:13:13,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764920649] [2021-07-09 17:13:13,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:13,807 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:13:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:13,915 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-07-09 17:13:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 18 [2021-07-09 17:13:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:13,918 INFO L225 Difference]: With dead ends: 1540 [2021-07-09 17:13:13,918 INFO L226 Difference]: Without dead ends: 1536 [2021-07-09 17:13:13,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-07-09 17:13:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-07-09 17:13:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-07-09 17:13:13,938 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-07-09 17:13:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:13,938 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-07-09 17:13:13,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 17:13:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-07-09 17:13:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:13,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:13,940 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:14,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 17:13:14,153 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-07-09 17:13:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:14,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613032889] [2021-07-09 17:13:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:14,189 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 17:13:14,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613032889] [2021-07-09 17:13:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613032889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080010886] [2021-07-09 17:13:14,189 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 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 17:13:14,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080010886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121836552] [2021-07-09 17:13:14,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:14,254 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:13:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:14,333 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-07-09 17:13:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-07-09 17:13:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:14,337 INFO L225 Difference]: With dead ends: 1886 [2021-07-09 17:13:14,337 INFO L226 Difference]: Without dead ends: 1886 [2021-07-09 17:13:14,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-07-09 17:13:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-07-09 17:13:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-07-09 17:13:14,363 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-07-09 17:13:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:14,363 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-07-09 17:13:14,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:13:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-07-09 17:13:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:14,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:14,365 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:14,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:14,581 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-07-09 17:13:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:14,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442988631] [2021-07-09 17:13:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:14,638 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 17:13:14,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442988631] [2021-07-09 17:13:14,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442988631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141220316] [2021-07-09 17:13:14,638 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 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 17:13:14,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:14,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141220316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:14,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:14,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090203857] [2021-07-09 17:13:14,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:14,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:14,694 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:14,777 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-07-09 17:13:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:14,781 INFO L225 Difference]: With dead ends: 2131 [2021-07-09 17:13:14,781 INFO L226 Difference]: Without dead ends: 2131 [2021-07-09 17:13:14,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-07-09 17:13:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-07-09 17:13:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-07-09 17:13:14,800 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-07-09 17:13:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-07-09 17:13:14,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-07-09 17:13:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:14,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:14,802 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:15,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-07-09 17:13:15,002 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-07-09 17:13:15,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:15,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7311679] [2021-07-09 17:13:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:15,046 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 17:13:15,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7311679] [2021-07-09 17:13:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7311679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869261512] [2021-07-09 17:13:15,047 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 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 17:13:15,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:13:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:15,099 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 17:13:15,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869261512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:15,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:15,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857159178] [2021-07-09 17:13:15,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:15,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:15,101 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:15,214 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-07-09 17:13:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:15,217 INFO L225 Difference]: With dead ends: 1469 [2021-07-09 17:13:15,217 INFO L226 Difference]: Without dead ends: 1469 [2021-07-09 17:13:15,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-07-09 17:13:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-07-09 17:13:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-07-09 17:13:15,236 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-07-09 17:13:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:15,236 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-07-09 17:13:15,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-07-09 17:13:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:15,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:15,237 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:15,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:15,453 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-07-09 17:13:15,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:15,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742701395] [2021-07-09 17:13:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:15,494 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 17:13:15,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742701395] [2021-07-09 17:13:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742701395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178370871] [2021-07-09 17:13:15,495 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 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 17:13:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178370871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:15,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473942921] [2021-07-09 17:13:15,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:15,561 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 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 17:13:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:15,652 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-07-09 17:13:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:15,652 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 18 [2021-07-09 17:13:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:15,654 INFO L225 Difference]: With dead ends: 1280 [2021-07-09 17:13:15,654 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 17:13:15,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 17:13:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-07-09 17:13:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-07-09 17:13:15,669 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-07-09 17:13:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:15,669 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-07-09 17:13:15,669 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 17:13:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-07-09 17:13:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:15,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:15,670 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:15,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-09 17:13:15,889 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-07-09 17:13:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:15,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604623435] [2021-07-09 17:13:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:15,935 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 17:13:15,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604623435] [2021-07-09 17:13:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604623435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625924261] [2021-07-09 17:13:15,936 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 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 17:13:15,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:15,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:15,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625924261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:15,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:15,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555557192] [2021-07-09 17:13:15,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:15,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:15,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:15,990 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 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 17:13:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:16,039 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-07-09 17:13:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:16,039 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 18 [2021-07-09 17:13:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:16,041 INFO L225 Difference]: With dead ends: 1248 [2021-07-09 17:13:16,042 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 17:13:16,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 17:13:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-07-09 17:13:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-07-09 17:13:16,055 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-07-09 17:13:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:16,055 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-07-09 17:13:16,055 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 17:13:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-07-09 17:13:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:16,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:16,057 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:16,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:16,272 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-07-09 17:13:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:16,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599751703] [2021-07-09 17:13:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:16,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:16,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599751703] [2021-07-09 17:13:16,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599751703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309140272] [2021-07-09 17:13:16,311 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 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 17:13:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:16,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309140272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:16,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404622666] [2021-07-09 17:13:16,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:16,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:16,369 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:16,430 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-07-09 17:13:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:16,432 INFO L225 Difference]: With dead ends: 1212 [2021-07-09 17:13:16,432 INFO L226 Difference]: Without dead ends: 1212 [2021-07-09 17:13:16,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-09 17:13:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-07-09 17:13:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-07-09 17:13:16,447 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-07-09 17:13:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:16,447 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-07-09 17:13:16,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-07-09 17:13:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:16,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:16,448 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:16,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:16,649 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-07-09 17:13:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:16,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716421170] [2021-07-09 17:13:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:16,691 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 17:13:16,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716421170] [2021-07-09 17:13:16,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716421170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231301753] [2021-07-09 17:13:16,691 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 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 17:13:16,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:16,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:16,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:16,749 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 17:13:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231301753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:16,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686069325] [2021-07-09 17:13:16,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:16,750 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:16,828 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-07-09 17:13:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:16,830 INFO L225 Difference]: With dead ends: 1269 [2021-07-09 17:13:16,830 INFO L226 Difference]: Without dead ends: 1269 [2021-07-09 17:13:16,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-09 17:13:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-07-09 17:13:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-07-09 17:13:16,843 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-07-09 17:13:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:16,843 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-07-09 17:13:16,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-07-09 17:13:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:16,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:16,845 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:17,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-07-09 17:13:17,045 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-07-09 17:13:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:17,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668569355] [2021-07-09 17:13:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:17,089 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 17:13:17,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668569355] [2021-07-09 17:13:17,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668569355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875632023] [2021-07-09 17:13:17,090 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 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 17:13:17,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:17,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:17,155 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 17:13:17,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875632023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:17,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:17,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368222642] [2021-07-09 17:13:17,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:17,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:17,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:17,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:17,155 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:17,248 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-07-09 17:13:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:17,251 INFO L225 Difference]: With dead ends: 1385 [2021-07-09 17:13:17,252 INFO L226 Difference]: Without dead ends: 1385 [2021-07-09 17:13:17,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-07-09 17:13:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-07-09 17:13:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-07-09 17:13:17,277 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-07-09 17:13:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:17,277 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-07-09 17:13:17,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-07-09 17:13:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:17,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:17,278 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:17,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-09 17:13:17,494 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-07-09 17:13:17,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:17,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084250572] [2021-07-09 17:13:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:17,535 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 17:13:17,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:17,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084250572] [2021-07-09 17:13:17,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084250572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274059915] [2021-07-09 17:13:17,535 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 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 17:13:17,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:13:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:17,605 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 17:13:17,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274059915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:17,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:17,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533427955] [2021-07-09 17:13:17,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:17,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:17,606 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:17,771 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-07-09 17:13:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:17,773 INFO L225 Difference]: With dead ends: 1491 [2021-07-09 17:13:17,773 INFO L226 Difference]: Without dead ends: 1491 [2021-07-09 17:13:17,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:13:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-07-09 17:13:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-07-09 17:13:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-07-09 17:13:17,791 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-07-09 17:13:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:17,791 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-07-09 17:13:17,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-07-09 17:13:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:17,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:17,793 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:18,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:18,001 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-07-09 17:13:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:18,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296105637] [2021-07-09 17:13:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,036 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 17:13:18,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:18,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296105637] [2021-07-09 17:13:18,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296105637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713410314] [2021-07-09 17:13:18,036 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 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 17:13:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713410314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:18,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886360620] [2021-07-09 17:13:18,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:18,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:18,085 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:13:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:18,193 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-07-09 17:13:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-07-09 17:13:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:18,196 INFO L225 Difference]: With dead ends: 1466 [2021-07-09 17:13:18,196 INFO L226 Difference]: Without dead ends: 1462 [2021-07-09 17:13:18,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-07-09 17:13:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-07-09 17:13:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-07-09 17:13:18,218 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-07-09 17:13:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:18,218 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-07-09 17:13:18,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:13:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-07-09 17:13:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:18,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:18,220 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:18,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 17:13:18,429 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:18,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-07-09 17:13:18,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:18,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158387346] [2021-07-09 17:13:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,474 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 17:13:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158387346] [2021-07-09 17:13:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158387346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565843752] [2021-07-09 17:13:18,475 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 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 17:13:18,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:18,529 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 17:13:18,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565843752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:18,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:18,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171994590] [2021-07-09 17:13:18,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:18,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:18,530 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:18,639 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-07-09 17:13:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:18,651 INFO L225 Difference]: With dead ends: 1717 [2021-07-09 17:13:18,652 INFO L226 Difference]: Without dead ends: 1717 [2021-07-09 17:13:18,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-07-09 17:13:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-07-09 17:13:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-07-09 17:13:18,672 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-07-09 17:13:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:18,672 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-07-09 17:13:18,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-07-09 17:13:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:18,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:18,674 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:18,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 17:13:18,890 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-07-09 17:13:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:18,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433399270] [2021-07-09 17:13:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,938 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 17:13:18,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433399270] [2021-07-09 17:13:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433399270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936929164] [2021-07-09 17:13:18,938 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 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 17:13:18,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:18,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:19,041 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 17:13:19,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936929164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:19,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:19,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884611525] [2021-07-09 17:13:19,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:19,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:19,042 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:19,155 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-07-09 17:13:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:19,159 INFO L225 Difference]: With dead ends: 1815 [2021-07-09 17:13:19,159 INFO L226 Difference]: Without dead ends: 1815 [2021-07-09 17:13:19,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-07-09 17:13:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-07-09 17:13:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-07-09 17:13:19,195 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-07-09 17:13:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:19,195 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-07-09 17:13:19,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-07-09 17:13:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:19,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:19,197 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:19,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-09 17:13:19,397 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-07-09 17:13:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:19,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670339513] [2021-07-09 17:13:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:19,439 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 17:13:19,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:19,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670339513] [2021-07-09 17:13:19,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670339513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118702027] [2021-07-09 17:13:19,439 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 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 17:13:19,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:19,494 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 17:13:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118702027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:19,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611845866] [2021-07-09 17:13:19,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:19,495 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:19,657 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-07-09 17:13:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:19,659 INFO L225 Difference]: With dead ends: 1539 [2021-07-09 17:13:19,659 INFO L226 Difference]: Without dead ends: 1539 [2021-07-09 17:13:19,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:13:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-07-09 17:13:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-07-09 17:13:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-07-09 17:13:19,674 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-07-09 17:13:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:19,674 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-07-09 17:13:19,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-07-09 17:13:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:19,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:19,675 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:19,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-09 17:13:19,881 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-07-09 17:13:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:19,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429052560] [2021-07-09 17:13:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:19,918 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 17:13:19,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:19,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429052560] [2021-07-09 17:13:19,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429052560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644459761] [2021-07-09 17:13:19,918 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 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 17:13:19,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:19,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644459761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:19,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:19,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946301561] [2021-07-09 17:13:19,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:19,965 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 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 17:13:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:20,054 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-07-09 17:13:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:20,054 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 18 [2021-07-09 17:13:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:20,056 INFO L225 Difference]: With dead ends: 1319 [2021-07-09 17:13:20,056 INFO L226 Difference]: Without dead ends: 1315 [2021-07-09 17:13:20,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-07-09 17:13:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-07-09 17:13:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-07-09 17:13:20,075 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-07-09 17:13:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:20,075 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-07-09 17:13:20,075 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 17:13:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-07-09 17:13:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:20,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:20,077 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:20,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-07-09 17:13:20,292 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-07-09 17:13:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:20,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944886842] [2021-07-09 17:13:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:20,336 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 17:13:20,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944886842] [2021-07-09 17:13:20,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944886842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095130824] [2021-07-09 17:13:20,337 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 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 17:13:20,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:20,411 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 17:13:20,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095130824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:20,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:20,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295603517] [2021-07-09 17:13:20,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:20,413 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 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 17:13:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:20,464 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-07-09 17:13:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:20,468 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 18 [2021-07-09 17:13:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:20,470 INFO L225 Difference]: With dead ends: 1350 [2021-07-09 17:13:20,470 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 17:13:20,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 17:13:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-07-09 17:13:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-07-09 17:13:20,485 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-07-09 17:13:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:20,485 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-07-09 17:13:20,485 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 17:13:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-07-09 17:13:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:20,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:20,486 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:20,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:20,701 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-07-09 17:13:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484729987] [2021-07-09 17:13:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:20,739 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 17:13:20,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:20,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484729987] [2021-07-09 17:13:20,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484729987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112278426] [2021-07-09 17:13:20,739 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 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 17:13:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:20,796 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 17:13:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112278426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:20,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653352151] [2021-07-09 17:13:20,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:20,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:20,797 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:20,872 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-07-09 17:13:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:20,874 INFO L225 Difference]: With dead ends: 1356 [2021-07-09 17:13:20,874 INFO L226 Difference]: Without dead ends: 1356 [2021-07-09 17:13:20,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-07-09 17:13:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-07-09 17:13:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-07-09 17:13:20,888 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-07-09 17:13:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:20,888 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-07-09 17:13:20,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-07-09 17:13:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:20,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:20,889 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:21,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:21,090 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-07-09 17:13:21,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:21,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15278398] [2021-07-09 17:13:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:21,128 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 17:13:21,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15278398] [2021-07-09 17:13:21,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15278398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138818652] [2021-07-09 17:13:21,128 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 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 17:13:21,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:21,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:21,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138818652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:21,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:13:21,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664530754] [2021-07-09 17:13:21,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:21,196 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:21,252 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-07-09 17:13:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:13:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-07-09 17:13:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:21,254 INFO L225 Difference]: With dead ends: 1623 [2021-07-09 17:13:21,254 INFO L226 Difference]: Without dead ends: 1623 [2021-07-09 17:13:21,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-09 17:13:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-07-09 17:13:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-07-09 17:13:21,271 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-07-09 17:13:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:21,271 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-07-09 17:13:21,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-07-09 17:13:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:21,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:21,273 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:21,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:21,473 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-07-09 17:13:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:21,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764596126] [2021-07-09 17:13:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:21,518 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 17:13:21,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:21,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764596126] [2021-07-09 17:13:21,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764596126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407844040] [2021-07-09 17:13:21,518 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 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 17:13:21,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:21,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:21,572 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 17:13:21,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407844040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:21,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648518126] [2021-07-09 17:13:21,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:21,573 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:21,661 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-07-09 17:13:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:21,663 INFO L225 Difference]: With dead ends: 1693 [2021-07-09 17:13:21,663 INFO L226 Difference]: Without dead ends: 1693 [2021-07-09 17:13:21,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-07-09 17:13:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-07-09 17:13:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-07-09 17:13:21,682 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-07-09 17:13:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:21,682 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-07-09 17:13:21,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-07-09 17:13:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:21,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:21,683 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:21,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:21,897 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-07-09 17:13:21,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:21,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405963933] [2021-07-09 17:13:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:21,944 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 17:13:21,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405963933] [2021-07-09 17:13:21,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405963933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603850953] [2021-07-09 17:13:21,944 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 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 17:13:21,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:21,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:21,998 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 17:13:21,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603850953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:21,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202754391] [2021-07-09 17:13:21,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:21,999 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:22,120 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-07-09 17:13:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:22,122 INFO L225 Difference]: With dead ends: 1777 [2021-07-09 17:13:22,122 INFO L226 Difference]: Without dead ends: 1777 [2021-07-09 17:13:22,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-09 17:13:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-07-09 17:13:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-07-09 17:13:22,140 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-07-09 17:13:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:22,140 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-07-09 17:13:22,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-07-09 17:13:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:22,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:22,142 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:22,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-09 17:13:22,343 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-07-09 17:13:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:22,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045604714] [2021-07-09 17:13:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:22,408 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 17:13:22,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:22,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045604714] [2021-07-09 17:13:22,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045604714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:22,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142094003] [2021-07-09 17:13:22,408 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 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 17:13:22,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:13:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:22,470 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 17:13:22,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142094003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:22,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:22,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:13:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114001932] [2021-07-09 17:13:22,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:22,471 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:22,663 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-07-09 17:13:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:13:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-07-09 17:13:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:22,666 INFO L225 Difference]: With dead ends: 1973 [2021-07-09 17:13:22,666 INFO L226 Difference]: Without dead ends: 1973 [2021-07-09 17:13:22,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:13:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-07-09 17:13:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-07-09 17:13:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-07-09 17:13:22,686 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-07-09 17:13:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-07-09 17:13:22,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17:13:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-07-09 17:13:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:22,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:22,689 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:22,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-09 17:13:22,889 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-07-09 17:13:22,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:22,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710746306] [2021-07-09 17:13:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:22,952 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 17:13:22,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:22,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710746306] [2021-07-09 17:13:22,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710746306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:22,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278851343] [2021-07-09 17:13:22,953 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 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 17:13:22,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:23,005 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 17:13:23,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278851343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:23,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:23,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-07-09 17:13:23,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422737667] [2021-07-09 17:13:23,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:23,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:23,006 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 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 17:13:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:23,175 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-07-09 17:13:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:13:23,175 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 18 [2021-07-09 17:13:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:23,177 INFO L225 Difference]: With dead ends: 1834 [2021-07-09 17:13:23,177 INFO L226 Difference]: Without dead ends: 1830 [2021-07-09 17:13:23,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-07-09 17:13:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-07-09 17:13:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-07-09 17:13:23,197 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-07-09 17:13:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:23,197 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-07-09 17:13:23,197 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 17:13:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-07-09 17:13:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:23,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:23,199 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:23,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:23,400 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-07-09 17:13:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:23,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939493366] [2021-07-09 17:13:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:23,458 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 17:13:23,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939493366] [2021-07-09 17:13:23,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939493366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305855678] [2021-07-09 17:13:23,459 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 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 17:13:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:23,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:23,522 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 17:13:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305855678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:23,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:23,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:13:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140119861] [2021-07-09 17:13:23,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:23,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:23,523 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:23,780 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-07-09 17:13:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:13:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-07-09 17:13:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:23,783 INFO L225 Difference]: With dead ends: 2513 [2021-07-09 17:13:23,783 INFO L226 Difference]: Without dead ends: 2513 [2021-07-09 17:13:23,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:13:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-07-09 17:13:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-07-09 17:13:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-07-09 17:13:23,806 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-07-09 17:13:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:23,806 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-07-09 17:13:23,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-07-09 17:13:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:23,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:23,808 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:24,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 17:13:24,009 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-07-09 17:13:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:24,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781590862] [2021-07-09 17:13:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:24,064 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 17:13:24,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:24,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781590862] [2021-07-09 17:13:24,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781590862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838882089] [2021-07-09 17:13:24,065 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 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 17:13:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:24,128 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 17:13:24,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838882089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:13:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137446218] [2021-07-09 17:13:24,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:24,129 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:24,365 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-07-09 17:13:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:13:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-07-09 17:13:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:24,367 INFO L225 Difference]: With dead ends: 2122 [2021-07-09 17:13:24,368 INFO L226 Difference]: Without dead ends: 2122 [2021-07-09 17:13:24,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:13:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-09 17:13:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-07-09 17:13:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-07-09 17:13:24,408 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-07-09 17:13:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:24,408 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-07-09 17:13:24,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-07-09 17:13:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:24,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:24,410 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:24,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:24,621 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-07-09 17:13:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:24,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273150855] [2021-07-09 17:13:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:24,675 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 17:13:24,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:24,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273150855] [2021-07-09 17:13:24,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273150855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526501609] [2021-07-09 17:13:24,675 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 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 17:13:24,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:24,746 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 17:13:24,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526501609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:24,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:13:24,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744426602] [2021-07-09 17:13:24,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:24,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:24,747 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:24,974 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-07-09 17:13:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:13:24,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-07-09 17:13:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:24,977 INFO L225 Difference]: With dead ends: 2135 [2021-07-09 17:13:24,977 INFO L226 Difference]: Without dead ends: 2135 [2021-07-09 17:13:24,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:13:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-07-09 17:13:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-07-09 17:13:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-07-09 17:13:24,999 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-07-09 17:13:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:24,999 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-07-09 17:13:24,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-07-09 17:13:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:25,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:25,001 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:25,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-09 17:13:25,202 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-07-09 17:13:25,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:25,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837826177] [2021-07-09 17:13:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:25,257 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 17:13:25,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:25,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837826177] [2021-07-09 17:13:25,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837826177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521421084] [2021-07-09 17:13:25,257 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 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 17:13:25,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:25,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:25,321 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 17:13:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521421084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:25,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-09 17:13:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017955098] [2021-07-09 17:13:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:25,322 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 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 17:13:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:25,436 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-07-09 17:13:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:25,436 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 18 [2021-07-09 17:13:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:25,438 INFO L225 Difference]: With dead ends: 2025 [2021-07-09 17:13:25,438 INFO L226 Difference]: Without dead ends: 2023 [2021-07-09 17:13:25,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-07-09 17:13:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-07-09 17:13:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-07-09 17:13:25,460 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-07-09 17:13:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:25,461 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-07-09 17:13:25,461 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 17:13:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-07-09 17:13:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:25,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:25,463 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:25,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-09 17:13:25,663 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:25,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-07-09 17:13:25,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:25,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574614321] [2021-07-09 17:13:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:25,723 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 17:13:25,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574614321] [2021-07-09 17:13:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574614321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79004387] [2021-07-09 17:13:25,724 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:13:25,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:13:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:25,791 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 17:13:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79004387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:25,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-09 17:13:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043534318] [2021-07-09 17:13:25,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:25,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:25,792 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 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 17:13:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:25,894 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-07-09 17:13:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:25,894 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 18 [2021-07-09 17:13:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:25,897 INFO L225 Difference]: With dead ends: 2077 [2021-07-09 17:13:25,897 INFO L226 Difference]: Without dead ends: 2077 [2021-07-09 17:13:25,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-07-09 17:13:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-07-09 17:13:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-07-09 17:13:25,929 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-07-09 17:13:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:25,930 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-07-09 17:13:25,930 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 17:13:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-07-09 17:13:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:25,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:25,932 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:26,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-09 17:13:26,132 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-07-09 17:13:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455991082] [2021-07-09 17:13:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:26,184 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 17:13:26,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455991082] [2021-07-09 17:13:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455991082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002550355] [2021-07-09 17:13:26,184 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 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 17:13:26,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:26,251 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 17:13:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002550355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:26,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-09 17:13:26,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55309529] [2021-07-09 17:13:26,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:26,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:26,252 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 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 17:13:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:26,404 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-07-09 17:13:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:26,404 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 18 [2021-07-09 17:13:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:26,407 INFO L225 Difference]: With dead ends: 2122 [2021-07-09 17:13:26,407 INFO L226 Difference]: Without dead ends: 2122 [2021-07-09 17:13:26,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-09 17:13:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-07-09 17:13:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-07-09 17:13:26,429 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-07-09 17:13:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:26,429 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-07-09 17:13:26,429 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 17:13:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-07-09 17:13:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:26,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:26,431 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:26,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:26,632 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-07-09 17:13:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:26,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348606567] [2021-07-09 17:13:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:26,684 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 17:13:26,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348606567] [2021-07-09 17:13:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348606567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201214855] [2021-07-09 17:13:26,684 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 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 17:13:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:26,746 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 17:13:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201214855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:26,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-09 17:13:26,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772602480] [2021-07-09 17:13:26,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:26,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:26,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:26,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:26,747 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 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 17:13:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:26,882 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-07-09 17:13:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:26,883 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 18 [2021-07-09 17:13:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:26,885 INFO L225 Difference]: With dead ends: 2505 [2021-07-09 17:13:26,885 INFO L226 Difference]: Without dead ends: 2505 [2021-07-09 17:13:26,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-07-09 17:13:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-07-09 17:13:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-07-09 17:13:26,917 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-07-09 17:13:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:26,917 INFO L482 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-07-09 17:13:26,917 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 17:13:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-07-09 17:13:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:26,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:26,919 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:27,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:27,120 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-07-09 17:13:27,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:27,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964331946] [2021-07-09 17:13:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:27,173 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 17:13:27,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:27,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964331946] [2021-07-09 17:13:27,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964331946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633836070] [2021-07-09 17:13:27,173 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 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 17:13:27,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:27,241 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 17:13:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633836070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:27,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-09 17:13:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811046541] [2021-07-09 17:13:27,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:27,242 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 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 17:13:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:27,384 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-07-09 17:13:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:27,384 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 18 [2021-07-09 17:13:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:27,387 INFO L225 Difference]: With dead ends: 2489 [2021-07-09 17:13:27,387 INFO L226 Difference]: Without dead ends: 2489 [2021-07-09 17:13:27,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-07-09 17:13:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-07-09 17:13:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-07-09 17:13:27,416 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-07-09 17:13:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:27,416 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-07-09 17:13:27,416 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 17:13:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-07-09 17:13:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:27,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:27,418 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:27,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:27,619 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-07-09 17:13:27,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:27,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367513006] [2021-07-09 17:13:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:27,677 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 17:13:27,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367513006] [2021-07-09 17:13:27,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367513006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845684562] [2021-07-09 17:13:27,678 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 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 17:13:27,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:27,766 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 17:13:27,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845684562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:27,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:13:27,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849023421] [2021-07-09 17:13:27,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:27,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:27,767 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 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 17:13:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:27,944 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-07-09 17:13:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:27,944 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 18 [2021-07-09 17:13:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:27,947 INFO L225 Difference]: With dead ends: 2555 [2021-07-09 17:13:27,947 INFO L226 Difference]: Without dead ends: 2555 [2021-07-09 17:13:27,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:13:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-09 17:13:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-07-09 17:13:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-07-09 17:13:27,973 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-07-09 17:13:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:27,973 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-07-09 17:13:27,973 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 17:13:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-07-09 17:13:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:27,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:27,976 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:28,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:28,189 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-07-09 17:13:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:28,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372313695] [2021-07-09 17:13:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:28,240 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 17:13:28,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:28,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372313695] [2021-07-09 17:13:28,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372313695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762826734] [2021-07-09 17:13:28,240 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 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 17:13:28,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:28,309 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 17:13:28,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762826734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:28,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:13:28,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276717399] [2021-07-09 17:13:28,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:28,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:28,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:28,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:28,310 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 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 17:13:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:28,474 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-07-09 17:13:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:28,474 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 18 [2021-07-09 17:13:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:28,477 INFO L225 Difference]: With dead ends: 2601 [2021-07-09 17:13:28,477 INFO L226 Difference]: Without dead ends: 2601 [2021-07-09 17:13:28,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:13:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-07-09 17:13:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-07-09 17:13:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-07-09 17:13:28,511 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-07-09 17:13:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:28,511 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-07-09 17:13:28,511 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 17:13:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-07-09 17:13:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:13:28,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:28,513 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:28,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:28,714 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-07-09 17:13:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:28,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380001978] [2021-07-09 17:13:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:28,785 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 17:13:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380001978] [2021-07-09 17:13:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380001978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026474952] [2021-07-09 17:13:28,786 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 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 17:13:28,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:28,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:28,863 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 17:13:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026474952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:13:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448188147] [2021-07-09 17:13:28,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:28,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:28,864 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:13:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:29,104 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-07-09 17:13:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:13:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 18 [2021-07-09 17:13:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:29,107 INFO L225 Difference]: With dead ends: 2926 [2021-07-09 17:13:29,107 INFO L226 Difference]: Without dead ends: 2926 [2021-07-09 17:13:29,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:13:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-07-09 17:13:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-07-09 17:13:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-07-09 17:13:29,135 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-07-09 17:13:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:29,135 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-07-09 17:13:29,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:13:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-07-09 17:13:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:29,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:29,137 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:29,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-09 17:13:29,338 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:29,338 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-07-09 17:13:29,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:29,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896840817] [2021-07-09 17:13:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:29,415 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 17:13:29,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:29,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896840817] [2021-07-09 17:13:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896840817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:29,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891545873] [2021-07-09 17:13:29,415 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 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 17:13:29,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:13:29,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:29,527 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 17:13:29,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891545873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:29,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:29,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-09 17:13:29,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847534025] [2021-07-09 17:13:29,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:13:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:13:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:29,528 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 17:13:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:29,705 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-07-09 17:13:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 20 [2021-07-09 17:13:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:29,709 INFO L225 Difference]: With dead ends: 2653 [2021-07-09 17:13:29,709 INFO L226 Difference]: Without dead ends: 2647 [2021-07-09 17:13:29,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:13:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-07-09 17:13:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-07-09 17:13:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-07-09 17:13:29,738 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-07-09 17:13:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:29,738 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-07-09 17:13:29,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 17:13:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-07-09 17:13:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:29,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:29,741 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:29,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-09 17:13:29,942 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-07-09 17:13:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:29,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775997916] [2021-07-09 17:13:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:30,000 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 17:13:30,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775997916] [2021-07-09 17:13:30,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775997916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366112281] [2021-07-09 17:13:30,001 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:13:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:30,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:30,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366112281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:30,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-09 17:13:30,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429122182] [2021-07-09 17:13:30,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:30,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:30,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:30,052 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 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 17:13:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:30,146 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-07-09 17:13:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:30,147 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 20 [2021-07-09 17:13:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:30,150 INFO L225 Difference]: With dead ends: 2499 [2021-07-09 17:13:30,150 INFO L226 Difference]: Without dead ends: 2498 [2021-07-09 17:13:30,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-07-09 17:13:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-07-09 17:13:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-07-09 17:13:30,177 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-07-09 17:13:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:30,177 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-07-09 17:13:30,177 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 17:13:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-07-09 17:13:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:30,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:30,181 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:30,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:30,409 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-07-09 17:13:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:30,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189040478] [2021-07-09 17:13:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:30,454 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 17:13:30,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189040478] [2021-07-09 17:13:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189040478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232022987] [2021-07-09 17:13:30,454 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 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 17:13:30,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:30,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232022987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:30,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:13:30,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257429341] [2021-07-09 17:13:30,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:30,512 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:30,589 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-07-09 17:13:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-07-09 17:13:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:30,592 INFO L225 Difference]: With dead ends: 2670 [2021-07-09 17:13:30,592 INFO L226 Difference]: Without dead ends: 2670 [2021-07-09 17:13:30,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-07-09 17:13:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-07-09 17:13:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-07-09 17:13:30,623 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-07-09 17:13:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:30,623 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-07-09 17:13:30,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-07-09 17:13:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:30,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:30,625 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:30,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-09 17:13:30,842 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-07-09 17:13:30,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:30,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350887233] [2021-07-09 17:13:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:30,893 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 17:13:30,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350887233] [2021-07-09 17:13:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350887233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930692092] [2021-07-09 17:13:30,893 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 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 17:13:30,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:13:30,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:30,952 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 17:13:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930692092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:30,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781622024] [2021-07-09 17:13:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:30,953 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 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 17:13:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:31,080 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-07-09 17:13:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:31,080 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 20 [2021-07-09 17:13:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:31,084 INFO L225 Difference]: With dead ends: 2616 [2021-07-09 17:13:31,084 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 17:13:31,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 17:13:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-07-09 17:13:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-07-09 17:13:31,137 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-07-09 17:13:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:31,137 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-07-09 17:13:31,137 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 17:13:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-07-09 17:13:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:31,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:31,140 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:31,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:31,340 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-07-09 17:13:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579913670] [2021-07-09 17:13:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:31,395 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 17:13:31,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:31,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579913670] [2021-07-09 17:13:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579913670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356226647] [2021-07-09 17:13:31,395 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 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 17:13:31,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:31,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:31,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:31,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356226647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:31,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907408935] [2021-07-09 17:13:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:31,475 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 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 17:13:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:31,611 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-07-09 17:13:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:31,611 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 20 [2021-07-09 17:13:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:31,614 INFO L225 Difference]: With dead ends: 2536 [2021-07-09 17:13:31,615 INFO L226 Difference]: Without dead ends: 2531 [2021-07-09 17:13:31,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-07-09 17:13:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-07-09 17:13:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:31,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-07-09 17:13:31,641 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-07-09 17:13:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:31,641 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-07-09 17:13:31,642 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 17:13:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-07-09 17:13:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:31,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:31,644 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:31,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-09 17:13:31,844 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-07-09 17:13:31,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:31,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127644939] [2021-07-09 17:13:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:31,881 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 17:13:31,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:31,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127644939] [2021-07-09 17:13:31,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127644939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851587881] [2021-07-09 17:13:31,882 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 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 17:13:31,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:13:31,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:31,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851587881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:31,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:13:31,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762193184] [2021-07-09 17:13:31,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:31,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:31,936 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:32,004 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-07-09 17:13:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-07-09 17:13:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:32,008 INFO L225 Difference]: With dead ends: 2646 [2021-07-09 17:13:32,008 INFO L226 Difference]: Without dead ends: 2644 [2021-07-09 17:13:32,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-07-09 17:13:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-07-09 17:13:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-07-09 17:13:32,046 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-07-09 17:13:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:32,046 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-07-09 17:13:32,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-07-09 17:13:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:32,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:32,048 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:32,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:32,249 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:32,250 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-07-09 17:13:32,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:32,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220066716] [2021-07-09 17:13:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:32,299 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 17:13:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220066716] [2021-07-09 17:13:32,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220066716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950909086] [2021-07-09 17:13:32,300 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 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 17:13:32,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:13:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:32,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950909086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:32,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-09 17:13:32,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854437655] [2021-07-09 17:13:32,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:32,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:32,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:32,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:32,362 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 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 17:13:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:32,487 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-07-09 17:13:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:32,487 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 20 [2021-07-09 17:13:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:32,490 INFO L225 Difference]: With dead ends: 2573 [2021-07-09 17:13:32,490 INFO L226 Difference]: Without dead ends: 2568 [2021-07-09 17:13:32,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-07-09 17:13:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-07-09 17:13:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-07-09 17:13:32,517 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-07-09 17:13:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:32,517 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-07-09 17:13:32,517 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 17:13:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-07-09 17:13:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:32,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:32,519 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:32,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:32,720 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-07-09 17:13:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:32,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490479696] [2021-07-09 17:13:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:32,771 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 17:13:32,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490479696] [2021-07-09 17:13:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490479696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865036558] [2021-07-09 17:13:32,772 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 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 17:13:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:32,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865036558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:32,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851685501] [2021-07-09 17:13:32,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:32,834 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 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 17:13:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:33,008 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-07-09 17:13:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:33,008 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 20 [2021-07-09 17:13:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:33,012 INFO L225 Difference]: With dead ends: 2568 [2021-07-09 17:13:33,012 INFO L226 Difference]: Without dead ends: 2563 [2021-07-09 17:13:33,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-09 17:13:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-07-09 17:13:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-07-09 17:13:33,045 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-07-09 17:13:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:33,045 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-07-09 17:13:33,045 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 17:13:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-07-09 17:13:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:33,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:33,047 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:33,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:33,261 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-07-09 17:13:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:33,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392941564] [2021-07-09 17:13:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:33,316 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 17:13:33,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:33,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392941564] [2021-07-09 17:13:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392941564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260581440] [2021-07-09 17:13:33,317 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 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 17:13:33,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:33,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260581440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:33,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:33,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998484103] [2021-07-09 17:13:33,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:33,393 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 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 17:13:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:33,514 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-07-09 17:13:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:33,514 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 20 [2021-07-09 17:13:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:33,517 INFO L225 Difference]: With dead ends: 2556 [2021-07-09 17:13:33,517 INFO L226 Difference]: Without dead ends: 2553 [2021-07-09 17:13:33,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-09 17:13:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-07-09 17:13:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-07-09 17:13:33,547 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-07-09 17:13:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:33,547 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-07-09 17:13:33,547 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 17:13:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-07-09 17:13:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:33,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:33,549 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:33,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-09 17:13:33,750 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-07-09 17:13:33,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:33,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038182398] [2021-07-09 17:13:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:33,791 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 17:13:33,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:33,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038182398] [2021-07-09 17:13:33,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038182398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797114345] [2021-07-09 17:13:33,791 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 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 17:13:33,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:13:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:33,851 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 17:13:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797114345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:33,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622495410] [2021-07-09 17:13:33,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:33,852 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 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 17:13:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:33,905 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-07-09 17:13:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:33,905 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 20 [2021-07-09 17:13:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:33,908 INFO L225 Difference]: With dead ends: 2583 [2021-07-09 17:13:33,909 INFO L226 Difference]: Without dead ends: 2581 [2021-07-09 17:13:33,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-07-09 17:13:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-07-09 17:13:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-07-09 17:13:33,937 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-07-09 17:13:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:33,937 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-07-09 17:13:33,937 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 17:13:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-07-09 17:13:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:33,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:33,940 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:34,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-07-09 17:13:34,140 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:34,140 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-07-09 17:13:34,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:34,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659483644] [2021-07-09 17:13:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:34,179 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 17:13:34,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659483644] [2021-07-09 17:13:34,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659483644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862241284] [2021-07-09 17:13:34,179 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 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 17:13:34,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:13:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:34,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862241284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:34,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:13:34,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882617352] [2021-07-09 17:13:34,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:34,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:34,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:34,238 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 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 17:13:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:34,298 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-07-09 17:13:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:34,298 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 17:13:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:34,301 INFO L225 Difference]: With dead ends: 2556 [2021-07-09 17:13:34,301 INFO L226 Difference]: Without dead ends: 2556 [2021-07-09 17:13:34,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-07-09 17:13:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-07-09 17:13:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-07-09 17:13:34,343 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-07-09 17:13:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:34,343 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-07-09 17:13:34,343 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 17:13:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-07-09 17:13:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:34,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:34,346 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:34,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-07-09 17:13:34,561 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-07-09 17:13:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:34,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186545217] [2021-07-09 17:13:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:34,612 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 17:13:34,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186545217] [2021-07-09 17:13:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186545217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94405564] [2021-07-09 17:13:34,613 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:13:34,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:13:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:34,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:34,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94405564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:34,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-09 17:13:34,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881895469] [2021-07-09 17:13:34,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:34,674 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 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 17:13:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:34,747 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-07-09 17:13:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:34,747 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 20 [2021-07-09 17:13:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:34,751 INFO L225 Difference]: With dead ends: 2533 [2021-07-09 17:13:34,751 INFO L226 Difference]: Without dead ends: 2533 [2021-07-09 17:13:34,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-07-09 17:13:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-07-09 17:13:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-07-09 17:13:34,785 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-07-09 17:13:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:34,785 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-07-09 17:13:34,785 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 17:13:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-07-09 17:13:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:34,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:34,787 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-09 17:13:34,993 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-07-09 17:13:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737046979] [2021-07-09 17:13:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,043 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 17:13:35,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737046979] [2021-07-09 17:13:35,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737046979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517132425] [2021-07-09 17:13:35,043 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 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 17:13:35,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:13:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:35,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:35,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517132425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:35,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-09 17:13:35,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370912318] [2021-07-09 17:13:35,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:35,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:35,097 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 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 17:13:35,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:35,214 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-07-09 17:13:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:35,214 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 20 [2021-07-09 17:13:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:35,218 INFO L225 Difference]: With dead ends: 2537 [2021-07-09 17:13:35,218 INFO L226 Difference]: Without dead ends: 2534 [2021-07-09 17:13:35,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-09 17:13:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-07-09 17:13:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-07-09 17:13:35,252 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-07-09 17:13:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:35,253 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-07-09 17:13:35,253 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 17:13:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-07-09 17:13:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:35,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:35,255 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:35,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-07-09 17:13:35,472 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:35,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-07-09 17:13:35,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:35,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657252005] [2021-07-09 17:13:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,531 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 17:13:35,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:35,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657252005] [2021-07-09 17:13:35,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657252005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364183426] [2021-07-09 17:13:35,531 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 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 17:13:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:35,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364183426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:35,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-09 17:13:35,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120753669] [2021-07-09 17:13:35,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:35,596 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 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 17:13:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:35,708 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-07-09 17:13:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:35,709 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 20 [2021-07-09 17:13:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:35,711 INFO L225 Difference]: With dead ends: 2538 [2021-07-09 17:13:35,711 INFO L226 Difference]: Without dead ends: 2533 [2021-07-09 17:13:35,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-07-09 17:13:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-07-09 17:13:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-07-09 17:13:35,741 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-07-09 17:13:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:35,742 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-07-09 17:13:35,742 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 17:13:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-07-09 17:13:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:35,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:35,744 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:35,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-09 17:13:35,957 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-07-09 17:13:35,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:35,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984559980] [2021-07-09 17:13:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:36,016 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 17:13:36,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:36,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984559980] [2021-07-09 17:13:36,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984559980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139873621] [2021-07-09 17:13:36,017 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 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 17:13:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139873621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:36,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:36,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-09 17:13:36,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178147002] [2021-07-09 17:13:36,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:36,065 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 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 17:13:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:36,171 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-07-09 17:13:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:36,171 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 20 [2021-07-09 17:13:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:36,175 INFO L225 Difference]: With dead ends: 2545 [2021-07-09 17:13:36,175 INFO L226 Difference]: Without dead ends: 2542 [2021-07-09 17:13:36,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-09 17:13:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-07-09 17:13:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-07-09 17:13:36,201 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-07-09 17:13:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:36,201 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-07-09 17:13:36,201 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 17:13:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-07-09 17:13:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:36,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:36,203 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:36,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 17:13:36,404 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-07-09 17:13:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:36,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193346396] [2021-07-09 17:13:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:36,466 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 17:13:36,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193346396] [2021-07-09 17:13:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193346396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114392295] [2021-07-09 17:13:36,466 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 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 17:13:36,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:13:36,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:36,522 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 17:13:36,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114392295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:36,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:36,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:13:36,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896238162] [2021-07-09 17:13:36,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:36,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:36,523 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:36,650 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-07-09 17:13:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:36,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:36,653 INFO L225 Difference]: With dead ends: 2536 [2021-07-09 17:13:36,653 INFO L226 Difference]: Without dead ends: 2532 [2021-07-09 17:13:36,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-07-09 17:13:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-07-09 17:13:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-07-09 17:13:36,685 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-07-09 17:13:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:36,685 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-07-09 17:13:36,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-07-09 17:13:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:36,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:36,687 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:36,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:36,888 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-07-09 17:13:36,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:36,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738320383] [2021-07-09 17:13:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:36,937 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 17:13:36,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738320383] [2021-07-09 17:13:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738320383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038921651] [2021-07-09 17:13:36,937 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 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 17:13:36,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:37,001 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 17:13:37,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038921651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:37,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294284928] [2021-07-09 17:13:37,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:37,002 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:37,084 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-07-09 17:13:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 20 [2021-07-09 17:13:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:37,087 INFO L225 Difference]: With dead ends: 2507 [2021-07-09 17:13:37,087 INFO L226 Difference]: Without dead ends: 2507 [2021-07-09 17:13:37,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-09 17:13:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-07-09 17:13:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-07-09 17:13:37,113 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-07-09 17:13:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:37,113 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-07-09 17:13:37,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17:13:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-07-09 17:13:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:37,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:37,116 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:37,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:37,316 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-07-09 17:13:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:37,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428071408] [2021-07-09 17:13:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:37,383 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 17:13:37,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428071408] [2021-07-09 17:13:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428071408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719224586] [2021-07-09 17:13:37,384 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 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 17:13:37,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:37,451 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 17:13:37,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719224586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:37,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26938982] [2021-07-09 17:13:37,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:37,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:37,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:37,452 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:37,564 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-07-09 17:13:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:37,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:13:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:37,567 INFO L225 Difference]: With dead ends: 2530 [2021-07-09 17:13:37,567 INFO L226 Difference]: Without dead ends: 2527 [2021-07-09 17:13:37,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-07-09 17:13:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-07-09 17:13:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-07-09 17:13:37,599 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-07-09 17:13:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:37,599 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-07-09 17:13:37,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-07-09 17:13:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:37,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:37,601 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:37,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:37,811 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-07-09 17:13:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:37,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849592324] [2021-07-09 17:13:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:37,863 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 17:13:37,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:37,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849592324] [2021-07-09 17:13:37,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849592324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891353914] [2021-07-09 17:13:37,864 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 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 17:13:37,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:37,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891353914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:37,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-09 17:13:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565168911] [2021-07-09 17:13:37,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:37,915 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 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 17:13:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:38,029 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-07-09 17:13:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:38,029 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 20 [2021-07-09 17:13:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:38,032 INFO L225 Difference]: With dead ends: 2601 [2021-07-09 17:13:38,033 INFO L226 Difference]: Without dead ends: 2598 [2021-07-09 17:13:38,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-07-09 17:13:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-07-09 17:13:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-07-09 17:13:38,060 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-07-09 17:13:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-07-09 17:13:38,060 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 17:13:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-07-09 17:13:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:38,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:38,062 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:38,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:38,263 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-07-09 17:13:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:38,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319780227] [2021-07-09 17:13:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:38,331 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 17:13:38,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:38,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319780227] [2021-07-09 17:13:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319780227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452933629] [2021-07-09 17:13:38,331 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 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 17:13:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452933629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-09 17:13:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404577235] [2021-07-09 17:13:38,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:38,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:38,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:38,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:38,381 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 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 17:13:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:38,497 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-07-09 17:13:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:38,497 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 20 [2021-07-09 17:13:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:38,500 INFO L225 Difference]: With dead ends: 2612 [2021-07-09 17:13:38,500 INFO L226 Difference]: Without dead ends: 2604 [2021-07-09 17:13:38,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-09 17:13:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-07-09 17:13:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-07-09 17:13:38,527 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-07-09 17:13:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:38,527 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-07-09 17:13:38,527 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 17:13:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-07-09 17:13:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:38,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:38,529 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:38,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 17:13:38,730 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-07-09 17:13:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:38,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175149753] [2021-07-09 17:13:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:38,767 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 17:13:38,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:38,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175149753] [2021-07-09 17:13:38,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175149753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050633019] [2021-07-09 17:13:38,768 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 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 17:13:38,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:38,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:38,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050633019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:38,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:13:38,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422038048] [2021-07-09 17:13:38,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:38,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:38,822 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:38,885 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-07-09 17:13:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-07-09 17:13:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:38,888 INFO L225 Difference]: With dead ends: 2604 [2021-07-09 17:13:38,888 INFO L226 Difference]: Without dead ends: 2604 [2021-07-09 17:13:38,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-09 17:13:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-07-09 17:13:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-07-09 17:13:38,915 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-07-09 17:13:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:38,915 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-07-09 17:13:38,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:13:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-07-09 17:13:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:38,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:38,918 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:39,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-09 17:13:39,131 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-07-09 17:13:39,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:39,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440111912] [2021-07-09 17:13:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:39,176 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 17:13:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440111912] [2021-07-09 17:13:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440111912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654548241] [2021-07-09 17:13:39,177 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 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 17:13:39,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:13:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:39,236 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 17:13:39,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654548241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:39,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:39,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080486488] [2021-07-09 17:13:39,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:39,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:39,237 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 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 17:13:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:39,350 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-07-09 17:13:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:39,350 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 20 [2021-07-09 17:13:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:39,353 INFO L225 Difference]: With dead ends: 2566 [2021-07-09 17:13:39,353 INFO L226 Difference]: Without dead ends: 2563 [2021-07-09 17:13:39,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-09 17:13:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-07-09 17:13:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-07-09 17:13:39,381 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-07-09 17:13:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:39,381 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-07-09 17:13:39,381 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 17:13:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-07-09 17:13:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:39,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:39,383 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:39,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-09 17:13:39,584 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-07-09 17:13:39,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:39,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879394329] [2021-07-09 17:13:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:39,635 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 17:13:39,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:39,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879394329] [2021-07-09 17:13:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879394329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857641410] [2021-07-09 17:13:39,635 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 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 17:13:39,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:39,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857641410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:39,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:39,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412728241] [2021-07-09 17:13:39,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:39,691 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 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 17:13:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:39,813 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-07-09 17:13:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:39,814 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 20 [2021-07-09 17:13:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:39,817 INFO L225 Difference]: With dead ends: 2572 [2021-07-09 17:13:39,817 INFO L226 Difference]: Without dead ends: 2567 [2021-07-09 17:13:39,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-07-09 17:13:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-07-09 17:13:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-07-09 17:13:39,845 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-07-09 17:13:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:39,845 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-07-09 17:13:39,845 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 17:13:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-07-09 17:13:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:39,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:39,847 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:40,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 17:13:40,048 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-07-09 17:13:40,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:40,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125145434] [2021-07-09 17:13:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:40,105 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 17:13:40,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125145434] [2021-07-09 17:13:40,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125145434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989701930] [2021-07-09 17:13:40,106 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 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 17:13:40,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:40,168 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 17:13:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989701930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:13:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989825608] [2021-07-09 17:13:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:40,169 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 17:13:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:40,298 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-07-09 17:13:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 17:13:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:40,302 INFO L225 Difference]: With dead ends: 2577 [2021-07-09 17:13:40,302 INFO L226 Difference]: Without dead ends: 2571 [2021-07-09 17:13:40,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-07-09 17:13:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-07-09 17:13:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-07-09 17:13:40,331 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-07-09 17:13:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:40,331 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-07-09 17:13:40,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 17:13:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-07-09 17:13:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:40,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:40,334 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:40,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:40,544 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-07-09 17:13:40,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:40,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717220334] [2021-07-09 17:13:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:40,602 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 17:13:40,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:40,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717220334] [2021-07-09 17:13:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717220334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203632949] [2021-07-09 17:13:40,602 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 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 17:13:40,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:40,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:40,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203632949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120871062] [2021-07-09 17:13:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:40,669 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 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 17:13:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:40,810 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-07-09 17:13:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:40,811 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 20 [2021-07-09 17:13:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:40,814 INFO L225 Difference]: With dead ends: 2689 [2021-07-09 17:13:40,814 INFO L226 Difference]: Without dead ends: 2681 [2021-07-09 17:13:40,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-07-09 17:13:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-07-09 17:13:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-07-09 17:13:40,841 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-07-09 17:13:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:40,841 INFO L482 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-07-09 17:13:40,841 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 17:13:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-07-09 17:13:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:40,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:40,843 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-09 17:13:41,057 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-07-09 17:13:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422177988] [2021-07-09 17:13:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:41,118 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 17:13:41,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422177988] [2021-07-09 17:13:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422177988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659588015] [2021-07-09 17:13:41,118 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 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 17:13:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659588015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:41,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:41,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298151382] [2021-07-09 17:13:41,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:41,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:41,173 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 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 17:13:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:41,301 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-07-09 17:13:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:41,301 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 20 [2021-07-09 17:13:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:41,305 INFO L225 Difference]: With dead ends: 2675 [2021-07-09 17:13:41,305 INFO L226 Difference]: Without dead ends: 2660 [2021-07-09 17:13:41,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-07-09 17:13:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-07-09 17:13:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-07-09 17:13:41,331 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-07-09 17:13:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:41,331 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-07-09 17:13:41,331 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 17:13:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-07-09 17:13:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:41,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:41,334 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:41,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:41,534 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-07-09 17:13:41,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:41,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143977238] [2021-07-09 17:13:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:41,581 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 17:13:41,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143977238] [2021-07-09 17:13:41,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143977238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552914739] [2021-07-09 17:13:41,582 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 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 17:13:41,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:41,637 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 17:13:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552914739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:41,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906139324] [2021-07-09 17:13:41,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:41,638 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:41,734 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-07-09 17:13:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:13:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:41,737 INFO L225 Difference]: With dead ends: 2669 [2021-07-09 17:13:41,738 INFO L226 Difference]: Without dead ends: 2669 [2021-07-09 17:13:41,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-07-09 17:13:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-07-09 17:13:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-07-09 17:13:41,778 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-07-09 17:13:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:41,778 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-07-09 17:13:41,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-07-09 17:13:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:41,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:41,780 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:41,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:41,982 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-07-09 17:13:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:41,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698690939] [2021-07-09 17:13:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:42,041 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 17:13:42,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698690939] [2021-07-09 17:13:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698690939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568741589] [2021-07-09 17:13:42,042 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 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 17:13:42,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:42,097 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 17:13:42,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568741589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:42,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:13:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998001859] [2021-07-09 17:13:42,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:42,098 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:42,197 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-07-09 17:13:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:42,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:42,201 INFO L225 Difference]: With dead ends: 2639 [2021-07-09 17:13:42,201 INFO L226 Difference]: Without dead ends: 2635 [2021-07-09 17:13:42,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-09 17:13:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-07-09 17:13:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-07-09 17:13:42,231 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-07-09 17:13:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:42,231 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-07-09 17:13:42,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:13:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-07-09 17:13:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:42,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:42,233 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:42,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-07-09 17:13:42,434 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-07-09 17:13:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:42,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441047543] [2021-07-09 17:13:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:42,493 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 17:13:42,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441047543] [2021-07-09 17:13:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441047543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419023198] [2021-07-09 17:13:42,493 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 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 17:13:42,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:42,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:42,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:42,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419023198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:42,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604107911] [2021-07-09 17:13:42,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:42,552 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 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 17:13:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:42,672 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-07-09 17:13:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:42,672 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 20 [2021-07-09 17:13:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:42,675 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:13:42,675 INFO L226 Difference]: Without dead ends: 2714 [2021-07-09 17:13:42,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-07-09 17:13:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-07-09 17:13:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-07-09 17:13:42,703 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-07-09 17:13:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:42,703 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-07-09 17:13:42,703 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 17:13:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-07-09 17:13:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:42,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:42,705 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:42,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:42,921 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-07-09 17:13:42,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:42,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554078170] [2021-07-09 17:13:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:42,981 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 17:13:42,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:42,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554078170] [2021-07-09 17:13:42,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554078170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439730649] [2021-07-09 17:13:42,981 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 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 17:13:43,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:43,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:43,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439730649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:43,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:43,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108605920] [2021-07-09 17:13:43,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:43,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:43,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:43,041 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 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 17:13:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:43,168 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-07-09 17:13:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:43,168 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 20 [2021-07-09 17:13:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:43,171 INFO L225 Difference]: With dead ends: 2775 [2021-07-09 17:13:43,171 INFO L226 Difference]: Without dead ends: 2760 [2021-07-09 17:13:43,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-09 17:13:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-07-09 17:13:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-07-09 17:13:43,198 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-07-09 17:13:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:43,199 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-07-09 17:13:43,199 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 17:13:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-07-09 17:13:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:43,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:43,201 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:43,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:43,401 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-07-09 17:13:43,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:43,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217707825] [2021-07-09 17:13:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:43,446 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 17:13:43,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:43,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217707825] [2021-07-09 17:13:43,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217707825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997201074] [2021-07-09 17:13:43,446 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 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 17:13:43,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:13:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:43,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997201074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:43,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-09 17:13:43,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589895732] [2021-07-09 17:13:43,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:43,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:43,503 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 17:13:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:43,572 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-07-09 17:13:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 20 [2021-07-09 17:13:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:43,576 INFO L225 Difference]: With dead ends: 2905 [2021-07-09 17:13:43,576 INFO L226 Difference]: Without dead ends: 2905 [2021-07-09 17:13:43,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-07-09 17:13:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-07-09 17:13:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-07-09 17:13:43,608 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-07-09 17:13:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:43,608 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-07-09 17:13:43,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 17:13:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-07-09 17:13:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:43,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:43,611 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:43,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-09 17:13:43,811 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-07-09 17:13:43,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:43,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584046694] [2021-07-09 17:13:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:43,859 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 17:13:43,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:43,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584046694] [2021-07-09 17:13:43,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584046694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065222924] [2021-07-09 17:13:43,859 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 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 17:13:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:43,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065222924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:43,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-09 17:13:43,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74492766] [2021-07-09 17:13:43,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:43,908 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 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 17:13:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:44,010 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-07-09 17:13:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:44,010 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 20 [2021-07-09 17:13:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:44,013 INFO L225 Difference]: With dead ends: 2846 [2021-07-09 17:13:44,013 INFO L226 Difference]: Without dead ends: 2845 [2021-07-09 17:13:44,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-07-09 17:13:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-07-09 17:13:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-07-09 17:13:44,045 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-07-09 17:13:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:44,045 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-07-09 17:13:44,045 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 17:13:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-07-09 17:13:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:44,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:44,047 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:44,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:44,248 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-07-09 17:13:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:44,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506833436] [2021-07-09 17:13:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:44,301 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 17:13:44,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:44,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506833436] [2021-07-09 17:13:44,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506833436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360268235] [2021-07-09 17:13:44,302 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 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 17:13:44,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:44,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:44,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:44,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360268235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:44,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:44,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627974773] [2021-07-09 17:13:44,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:44,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:44,355 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 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 17:13:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:44,477 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-07-09 17:13:44,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:44,478 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 20 [2021-07-09 17:13:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:44,481 INFO L225 Difference]: With dead ends: 2854 [2021-07-09 17:13:44,481 INFO L226 Difference]: Without dead ends: 2849 [2021-07-09 17:13:44,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-07-09 17:13:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-07-09 17:13:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-07-09 17:13:44,512 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-07-09 17:13:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:44,512 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-07-09 17:13:44,512 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 17:13:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-07-09 17:13:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:44,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:44,514 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:44,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-09 17:13:44,730 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-07-09 17:13:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:44,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27921621] [2021-07-09 17:13:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:44,782 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 17:13:44,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:44,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27921621] [2021-07-09 17:13:44,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27921621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214588800] [2021-07-09 17:13:44,782 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 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 17:13:44,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:44,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:44,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214588800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:44,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-09 17:13:44,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559471258] [2021-07-09 17:13:44,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:44,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:44,837 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 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 17:13:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:44,933 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-07-09 17:13:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:44,933 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 20 [2021-07-09 17:13:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:44,937 INFO L225 Difference]: With dead ends: 3212 [2021-07-09 17:13:44,937 INFO L226 Difference]: Without dead ends: 3209 [2021-07-09 17:13:44,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-07-09 17:13:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-07-09 17:13:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-07-09 17:13:44,970 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-07-09 17:13:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:44,970 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-07-09 17:13:44,970 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 17:13:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-07-09 17:13:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:44,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:44,973 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:45,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-09 17:13:45,175 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:45,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-07-09 17:13:45,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:45,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601749039] [2021-07-09 17:13:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:45,235 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 17:13:45,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601749039] [2021-07-09 17:13:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601749039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926081455] [2021-07-09 17:13:45,235 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 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 17:13:45,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926081455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:45,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228452257] [2021-07-09 17:13:45,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:45,290 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 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 17:13:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:45,401 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-07-09 17:13:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:45,402 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 20 [2021-07-09 17:13:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:45,406 INFO L225 Difference]: With dead ends: 3217 [2021-07-09 17:13:45,406 INFO L226 Difference]: Without dead ends: 3209 [2021-07-09 17:13:45,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-07-09 17:13:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-07-09 17:13:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-07-09 17:13:45,441 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-07-09 17:13:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:45,441 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-07-09 17:13:45,441 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 17:13:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-07-09 17:13:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:45,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:45,444 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:45,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 17:13:45,649 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-07-09 17:13:45,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:45,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487875295] [2021-07-09 17:13:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:45,726 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 17:13:45,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487875295] [2021-07-09 17:13:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487875295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297272991] [2021-07-09 17:13:45,727 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 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 17:13:45,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:45,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297272991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:45,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968517092] [2021-07-09 17:13:45,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:45,797 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 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 17:13:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:45,908 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-07-09 17:13:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:45,908 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 20 [2021-07-09 17:13:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:45,912 INFO L225 Difference]: With dead ends: 3000 [2021-07-09 17:13:45,912 INFO L226 Difference]: Without dead ends: 2995 [2021-07-09 17:13:45,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-07-09 17:13:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-07-09 17:13:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-07-09 17:13:45,943 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-07-09 17:13:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:45,943 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-07-09 17:13:45,943 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 17:13:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-07-09 17:13:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:45,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:45,945 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:46,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:46,146 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-07-09 17:13:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:46,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683335294] [2021-07-09 17:13:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:46,230 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 17:13:46,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683335294] [2021-07-09 17:13:46,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683335294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41453896] [2021-07-09 17:13:46,230 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 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 17:13:46,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:13:46,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:46,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41453896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:46,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:13:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814181760] [2021-07-09 17:13:46,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:46,295 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 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 17:13:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:46,415 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-07-09 17:13:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:46,416 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 20 [2021-07-09 17:13:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:46,419 INFO L225 Difference]: With dead ends: 2966 [2021-07-09 17:13:46,419 INFO L226 Difference]: Without dead ends: 2960 [2021-07-09 17:13:46,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-07-09 17:13:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-07-09 17:13:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-07-09 17:13:46,451 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-07-09 17:13:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:46,451 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-07-09 17:13:46,451 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 17:13:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-07-09 17:13:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:46,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:46,453 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:46,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-07-09 17:13:46,654 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-07-09 17:13:46,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:46,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16231097] [2021-07-09 17:13:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:46,724 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 17:13:46,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16231097] [2021-07-09 17:13:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16231097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594545090] [2021-07-09 17:13:46,725 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 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 17:13:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:46,791 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 17:13:46,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594545090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:46,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:13:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177020608] [2021-07-09 17:13:46,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:46,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:46,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:46,792 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 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 17:13:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:46,911 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-07-09 17:13:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:46,912 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 20 [2021-07-09 17:13:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:46,915 INFO L225 Difference]: With dead ends: 2994 [2021-07-09 17:13:46,915 INFO L226 Difference]: Without dead ends: 2994 [2021-07-09 17:13:46,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-07-09 17:13:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-07-09 17:13:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-07-09 17:13:46,955 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-07-09 17:13:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:46,955 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-07-09 17:13:46,955 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 17:13:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-07-09 17:13:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:46,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:46,958 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:47,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:47,158 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-07-09 17:13:47,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:47,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621265709] [2021-07-09 17:13:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:47,237 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 17:13:47,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621265709] [2021-07-09 17:13:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621265709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862994132] [2021-07-09 17:13:47,237 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 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 17:13:47,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:47,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:47,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:47,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862994132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:47,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-07-09 17:13:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934795986] [2021-07-09 17:13:47,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:47,301 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:13:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:47,422 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-07-09 17:13:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 20 [2021-07-09 17:13:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:47,426 INFO L225 Difference]: With dead ends: 2954 [2021-07-09 17:13:47,426 INFO L226 Difference]: Without dead ends: 2949 [2021-07-09 17:13:47,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-07-09 17:13:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-07-09 17:13:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-07-09 17:13:47,459 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-07-09 17:13:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:47,459 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-07-09 17:13:47,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:13:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-07-09 17:13:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:47,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:47,462 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:47,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:47,663 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-07-09 17:13:47,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:47,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801191089] [2021-07-09 17:13:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:47,726 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 17:13:47,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:47,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801191089] [2021-07-09 17:13:47,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801191089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628129332] [2021-07-09 17:13:47,727 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 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 17:13:47,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:47,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:13:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:47,792 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 17:13:47,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628129332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:47,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 17:13:47,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528760371] [2021-07-09 17:13:47,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:47,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:47,793 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:13:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:47,923 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-07-09 17:13:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 20 [2021-07-09 17:13:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:47,928 INFO L225 Difference]: With dead ends: 3147 [2021-07-09 17:13:47,928 INFO L226 Difference]: Without dead ends: 3132 [2021-07-09 17:13:47,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-09 17:13:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-07-09 17:13:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-07-09 17:13:47,964 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-07-09 17:13:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:47,964 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-07-09 17:13:47,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:13:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-07-09 17:13:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:47,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:47,967 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:48,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:48,168 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-07-09 17:13:48,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:48,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242435218] [2021-07-09 17:13:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:48,254 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 17:13:48,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:48,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242435218] [2021-07-09 17:13:48,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242435218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158576929] [2021-07-09 17:13:48,255 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 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 17:13:48,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:48,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:48,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158576929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:48,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-07-09 17:13:48,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987310801] [2021-07-09 17:13:48,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:48,322 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:13:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:48,463 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-07-09 17:13:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 20 [2021-07-09 17:13:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:48,467 INFO L225 Difference]: With dead ends: 3023 [2021-07-09 17:13:48,467 INFO L226 Difference]: Without dead ends: 3017 [2021-07-09 17:13:48,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-07-09 17:13:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-07-09 17:13:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-07-09 17:13:48,507 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-07-09 17:13:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:48,507 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-07-09 17:13:48,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:13:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-07-09 17:13:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:48,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:48,510 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:48,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:48,711 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-07-09 17:13:48,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:48,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336713916] [2021-07-09 17:13:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:48,772 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 17:13:48,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:48,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336713916] [2021-07-09 17:13:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336713916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603503353] [2021-07-09 17:13:48,772 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 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 17:13:48,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:13:48,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:48,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:48,835 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 17:13:48,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603503353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:48,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-07-09 17:13:48,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828549371] [2021-07-09 17:13:48,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:48,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:48,836 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 17:13:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:48,937 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-07-09 17:13:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 20 [2021-07-09 17:13:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:48,941 INFO L225 Difference]: With dead ends: 3263 [2021-07-09 17:13:48,941 INFO L226 Difference]: Without dead ends: 3263 [2021-07-09 17:13:48,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-07-09 17:13:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-07-09 17:13:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-07-09 17:13:48,977 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-07-09 17:13:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:48,977 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-07-09 17:13:48,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 17:13:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-07-09 17:13:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:48,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:48,980 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:49,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 17:13:49,180 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-07-09 17:13:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:49,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024681863] [2021-07-09 17:13:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:49,243 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 17:13:49,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:49,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024681863] [2021-07-09 17:13:49,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024681863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923383550] [2021-07-09 17:13:49,243 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 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 17:13:49,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:49,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923383550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:49,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-07-09 17:13:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168638161] [2021-07-09 17:13:49,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:49,300 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:13:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:49,409 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-07-09 17:13:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 20 [2021-07-09 17:13:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:49,414 INFO L225 Difference]: With dead ends: 3211 [2021-07-09 17:13:49,414 INFO L226 Difference]: Without dead ends: 3210 [2021-07-09 17:13:49,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-07-09 17:13:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-07-09 17:13:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-07-09 17:13:49,458 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-07-09 17:13:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:49,458 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-07-09 17:13:49,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:13:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-07-09 17:13:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:49,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:49,461 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:49,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 17:13:49,661 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:49,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-07-09 17:13:49,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:49,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473393273] [2021-07-09 17:13:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:49,722 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 17:13:49,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473393273] [2021-07-09 17:13:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473393273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533525214] [2021-07-09 17:13:49,723 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 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 17:13:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533525214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-09 17:13:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372032196] [2021-07-09 17:13:49,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:49,787 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:49,920 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-07-09 17:13:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-07-09 17:13:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:49,925 INFO L225 Difference]: With dead ends: 3214 [2021-07-09 17:13:49,925 INFO L226 Difference]: Without dead ends: 3211 [2021-07-09 17:13:49,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-07-09 17:13:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-07-09 17:13:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-07-09 17:13:49,959 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-07-09 17:13:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:49,960 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-07-09 17:13:49,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-07-09 17:13:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:49,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:49,962 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:50,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-09 17:13:50,163 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-07-09 17:13:50,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:50,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096927294] [2021-07-09 17:13:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:50,222 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 17:13:50,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096927294] [2021-07-09 17:13:50,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096927294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967442627] [2021-07-09 17:13:50,223 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 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 17:13:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967442627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:50,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-09 17:13:50,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050340745] [2021-07-09 17:13:50,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:50,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:50,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:50,285 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:50,405 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-07-09 17:13:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-07-09 17:13:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:50,411 INFO L225 Difference]: With dead ends: 3712 [2021-07-09 17:13:50,411 INFO L226 Difference]: Without dead ends: 3709 [2021-07-09 17:13:50,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-07-09 17:13:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-07-09 17:13:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-07-09 17:13:50,464 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-07-09 17:13:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:50,464 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-07-09 17:13:50,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-07-09 17:13:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:50,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:50,468 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 17:13:50,668 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-07-09 17:13:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661282320] [2021-07-09 17:13:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:50,756 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 17:13:50,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661282320] [2021-07-09 17:13:50,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661282320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468205331] [2021-07-09 17:13:50,756 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 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 17:13:50,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:13:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:13:50,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468205331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:50,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-09 17:13:50,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440045130] [2021-07-09 17:13:50,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:50,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:50,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:50,834 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:50,953 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-07-09 17:13:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 20 [2021-07-09 17:13:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:50,958 INFO L225 Difference]: With dead ends: 3583 [2021-07-09 17:13:50,958 INFO L226 Difference]: Without dead ends: 3579 [2021-07-09 17:13:50,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-07-09 17:13:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-07-09 17:13:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-07-09 17:13:50,995 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-07-09 17:13:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:50,995 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-07-09 17:13:50,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:13:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-07-09 17:13:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:50,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:50,998 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:51,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:51,199 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-07-09 17:13:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:51,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780436087] [2021-07-09 17:13:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:51,272 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 17:13:51,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:51,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780436087] [2021-07-09 17:13:51,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780436087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996033148] [2021-07-09 17:13:51,272 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 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 17:13:51,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:51,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996033148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:51,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-07-09 17:13:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890930289] [2021-07-09 17:13:51,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:51,346 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 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 17:13:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:51,476 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-07-09 17:13:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:51,477 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 20 [2021-07-09 17:13:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:51,482 INFO L225 Difference]: With dead ends: 3595 [2021-07-09 17:13:51,482 INFO L226 Difference]: Without dead ends: 3580 [2021-07-09 17:13:51,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:13:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-07-09 17:13:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-07-09 17:13:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-07-09 17:13:51,525 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-07-09 17:13:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:51,526 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-07-09 17:13:51,526 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 17:13:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-07-09 17:13:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:51,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:51,529 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:51,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-09 17:13:51,745 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-07-09 17:13:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:51,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83977541] [2021-07-09 17:13:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:51,811 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 17:13:51,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:51,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83977541] [2021-07-09 17:13:51,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83977541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989317058] [2021-07-09 17:13:51,812 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 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 17:13:51,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:51,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:51,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:51,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989317058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:51,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-07-09 17:13:51,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18770568] [2021-07-09 17:13:51,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:51,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:51,901 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 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 17:13:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:52,023 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-07-09 17:13:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:52,024 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 20 [2021-07-09 17:13:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:52,028 INFO L225 Difference]: With dead ends: 3383 [2021-07-09 17:13:52,028 INFO L226 Difference]: Without dead ends: 3377 [2021-07-09 17:13:52,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:13:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-07-09 17:13:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-07-09 17:13:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-07-09 17:13:52,066 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-07-09 17:13:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:52,066 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-07-09 17:13:52,067 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 17:13:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-07-09 17:13:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:13:52,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:52,070 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:52,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-09 17:13:52,270 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-07-09 17:13:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:52,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055373397] [2021-07-09 17:13:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:52,349 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 17:13:52,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:52,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055373397] [2021-07-09 17:13:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055373397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:52,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873675229] [2021-07-09 17:13:52,349 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 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 17:13:52,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:13:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:13:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:52,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873675229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:52,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:52,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-09 17:13:52,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128058620] [2021-07-09 17:13:52,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:13:52,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:52,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:13:52,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:52,433 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:52,571 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-07-09 17:13:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:13:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:52,576 INFO L225 Difference]: With dead ends: 3346 [2021-07-09 17:13:52,576 INFO L226 Difference]: Without dead ends: 3339 [2021-07-09 17:13:52,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:13:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-07-09 17:13:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-07-09 17:13:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-07-09 17:13:52,614 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-07-09 17:13:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:52,614 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-07-09 17:13:52,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-07-09 17:13:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:52,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:52,617 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:52,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-07-09 17:13:52,817 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-07-09 17:13:52,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:52,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894508163] [2021-07-09 17:13:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:52,874 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 17:13:52,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894508163] [2021-07-09 17:13:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894508163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62716594] [2021-07-09 17:13:52,874 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 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 17:13:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:53,233 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:13:53,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:53,234 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 17:13:54,618 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-07-09 17:13:54,765 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-07-09 17:13:54,912 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 303 [2021-07-09 17:13:55,159 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 389 [2021-07-09 17:13:55,321 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 302 [2021-07-09 17:13:56,320 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 185 [2021-07-09 17:13:56,524 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 244 [2021-07-09 17:13:56,682 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 252 [2021-07-09 17:13:56,869 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-07-09 17:13:57,070 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-07-09 17:13:57,287 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 297 [2021-07-09 17:13:57,432 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 234 [2021-07-09 17:13:58,220 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 150 [2021-07-09 17:13:58,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:58,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:58,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:58,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:13:58,362 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 17:13:58,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62716594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:58,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:58,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:13:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096346065] [2021-07-09 17:13:58,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:13:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:13:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:58,363 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:58,517 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-07-09 17:13:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:13:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 17:13:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:58,522 INFO L225 Difference]: With dead ends: 3126 [2021-07-09 17:13:58,522 INFO L226 Difference]: Without dead ends: 3123 [2021-07-09 17:13:58,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-07-09 17:13:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-07-09 17:13:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-07-09 17:13:58,557 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-07-09 17:13:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:58,557 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-07-09 17:13:58,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-07-09 17:13:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:58,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:58,560 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:58,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:58,761 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-07-09 17:13:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441018436] [2021-07-09 17:13:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:58,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441018436] [2021-07-09 17:13:58,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441018436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744935498] [2021-07-09 17:13:58,818 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 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 17:13:58,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:59,136 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:13:59,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:59,137 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 17:13:59,746 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-07-09 17:13:59,856 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-07-09 17:13:59,991 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 255 [2021-07-09 17:14:00,126 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 268 [2021-07-09 17:14:00,409 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 340 [2021-07-09 17:14:01,305 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 284 [2021-07-09 17:14:01,532 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 304 [2021-07-09 17:14:01,773 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-07-09 17:14:02,020 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-07-09 17:14:02,302 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 332 [2021-07-09 17:14:02,719 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 351 [2021-07-09 17:14:02,915 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 214 [2021-07-09 17:14:03,533 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 268 [2021-07-09 17:14:04,081 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-07-09 17:14:04,247 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-07-09 17:14:04,409 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 269 [2021-07-09 17:14:04,574 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 277 [2021-07-09 17:14:05,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:05,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:05,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:05,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:05,366 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 17:14:05,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744935498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:05,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:05,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:05,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51016036] [2021-07-09 17:14:05,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:05,367 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 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 17:14:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:05,553 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-07-09 17:14:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:05,553 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 21 [2021-07-09 17:14:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:05,557 INFO L225 Difference]: With dead ends: 3204 [2021-07-09 17:14:05,557 INFO L226 Difference]: Without dead ends: 3200 [2021-07-09 17:14:05,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-07-09 17:14:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-07-09 17:14:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-07-09 17:14:05,596 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-07-09 17:14:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:05,596 INFO L482 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-07-09 17:14:05,596 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 17:14:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-07-09 17:14:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:05,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:05,599 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:05,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-07-09 17:14:05,800 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-07-09 17:14:05,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:05,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919906073] [2021-07-09 17:14:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:05,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:05,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919906073] [2021-07-09 17:14:05,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919906073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:05,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415064793] [2021-07-09 17:14:05,857 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 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 17:14:05,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:14:05,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:06,197 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:06,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:06,198 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 17:14:06,990 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 243 [2021-07-09 17:14:07,303 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 320 [2021-07-09 17:14:07,518 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 293 [2021-07-09 17:14:07,639 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 243 [2021-07-09 17:14:09,319 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 355 [2021-07-09 17:14:10,429 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 244 [2021-07-09 17:14:10,818 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 526 [2021-07-09 17:14:11,360 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 620 [2021-07-09 17:14:11,977 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 627 [2021-07-09 17:14:12,789 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-07-09 17:14:13,591 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-07-09 17:14:14,465 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 737 [2021-07-09 17:14:14,757 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 469 [2021-07-09 17:14:14,900 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 360 [2021-07-09 17:14:15,081 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 360 [2021-07-09 17:14:15,805 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 228 [2021-07-09 17:14:15,980 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-07-09 17:14:16,165 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-07-09 17:14:16,355 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 312 [2021-07-09 17:14:16,661 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2021-07-09 17:14:17,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:17,016 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 17:14:17,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415064793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:17,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:17,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501499161] [2021-07-09 17:14:17,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:17,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:17,017 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 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 17:14:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:17,213 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-07-09 17:14:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:17,213 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 21 [2021-07-09 17:14:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:17,218 INFO L225 Difference]: With dead ends: 3276 [2021-07-09 17:14:17,218 INFO L226 Difference]: Without dead ends: 3272 [2021-07-09 17:14:17,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-07-09 17:14:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-07-09 17:14:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-07-09 17:14:17,257 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-07-09 17:14:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:17,257 INFO L482 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-07-09 17:14:17,257 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 17:14:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-07-09 17:14:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:17,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:17,260 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:17,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-07-09 17:14:17,462 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-07-09 17:14:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:17,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452347063] [2021-07-09 17:14:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:17,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:17,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452347063] [2021-07-09 17:14:17,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452347063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727796376] [2021-07-09 17:14:17,516 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 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 17:14:17,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:17,843 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:17,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,844 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 17:14:18,509 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 238 [2021-07-09 17:14:18,639 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 257 [2021-07-09 17:14:20,758 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 300 [2021-07-09 17:14:20,994 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 388 [2021-07-09 17:14:21,291 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 391 [2021-07-09 17:14:21,698 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 436 [2021-07-09 17:14:22,166 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 485 [2021-07-09 17:14:22,989 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 248 [2021-07-09 17:14:23,580 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 308 [2021-07-09 17:14:23,956 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 349 [2021-07-09 17:14:24,299 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 366 [2021-07-09 17:14:25,167 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 721 [2021-07-09 17:14:26,167 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-07-09 17:14:27,176 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-07-09 17:14:28,291 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1306 DAG size of output: 771 [2021-07-09 17:14:29,382 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 770 DAG size of output: 843 [2021-07-09 17:14:29,707 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 345 [2021-07-09 17:14:30,754 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 655 [2021-07-09 17:14:31,058 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 380 [2021-07-09 17:14:31,611 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 247 [2021-07-09 17:14:31,842 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-07-09 17:14:32,064 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-07-09 17:14:32,393 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 376 [2021-07-09 17:14:32,846 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 229 [2021-07-09 17:14:33,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:33,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:33,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:33,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:33,072 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 17:14:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727796376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:33,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:33,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701373919] [2021-07-09 17:14:33,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:33,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:33,072 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 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 17:14:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:33,268 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-07-09 17:14:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:33,268 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 21 [2021-07-09 17:14:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:33,273 INFO L225 Difference]: With dead ends: 3340 [2021-07-09 17:14:33,273 INFO L226 Difference]: Without dead ends: 3336 [2021-07-09 17:14:33,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-07-09 17:14:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-07-09 17:14:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-07-09 17:14:33,310 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-07-09 17:14:33,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:33,310 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-07-09 17:14:33,310 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 17:14:33,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-07-09 17:14:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:33,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:33,313 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:33,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:33,517 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-07-09 17:14:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294392697] [2021-07-09 17:14:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:33,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:33,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294392697] [2021-07-09 17:14:33,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294392697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56895475] [2021-07-09 17:14:33,577 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 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 17:14:33,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:14:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:33,909 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:33,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:33,910 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 17:14:34,729 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 230 [2021-07-09 17:14:34,927 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 314 [2021-07-09 17:14:35,070 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 235 [2021-07-09 17:14:35,694 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 243 [2021-07-09 17:14:36,331 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 344 [2021-07-09 17:14:36,611 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2021-07-09 17:14:37,605 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-07-09 17:14:37,767 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 280 [2021-07-09 17:14:38,259 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-07-09 17:14:38,746 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-07-09 17:14:39,260 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 511 [2021-07-09 17:14:39,740 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 517 [2021-07-09 17:14:40,393 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 410 [2021-07-09 17:14:40,650 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 199 [2021-07-09 17:14:41,392 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-07-09 17:14:41,636 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-07-09 17:14:41,880 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-07-09 17:14:42,248 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 387 [2021-07-09 17:14:43,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:43,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:43,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:43,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:43,476 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 17:14:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56895475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:43,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:43,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55556261] [2021-07-09 17:14:43,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:43,477 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 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 17:14:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:43,729 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-07-09 17:14:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:43,729 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 21 [2021-07-09 17:14:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:43,733 INFO L225 Difference]: With dead ends: 3397 [2021-07-09 17:14:43,733 INFO L226 Difference]: Without dead ends: 3392 [2021-07-09 17:14:43,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-07-09 17:14:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-07-09 17:14:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-07-09 17:14:43,770 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-07-09 17:14:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:43,770 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-07-09 17:14:43,770 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 17:14:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-07-09 17:14:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:43,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:43,773 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:43,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-07-09 17:14:43,974 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-07-09 17:14:43,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541292159] [2021-07-09 17:14:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:44,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:44,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541292159] [2021-07-09 17:14:44,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541292159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:44,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541141059] [2021-07-09 17:14:44,032 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 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 17:14:44,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:14:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:44,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:44,369 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:44,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:44,370 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 17:14:44,967 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 222 [2021-07-09 17:14:45,074 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2021-07-09 17:14:45,190 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 242 [2021-07-09 17:14:45,810 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 248 [2021-07-09 17:14:46,676 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-07-09 17:14:46,907 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-07-09 17:14:47,187 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 348 [2021-07-09 17:14:48,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:48,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:48,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:48,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:48,164 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 17:14:48,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541141059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:48,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:48,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:48,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637272058] [2021-07-09 17:14:48,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:48,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:48,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:48,165 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 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 17:14:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:48,397 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-07-09 17:14:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:48,397 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 21 [2021-07-09 17:14:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:48,402 INFO L225 Difference]: With dead ends: 3484 [2021-07-09 17:14:48,402 INFO L226 Difference]: Without dead ends: 3480 [2021-07-09 17:14:48,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-07-09 17:14:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-07-09 17:14:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-07-09 17:14:48,440 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-07-09 17:14:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:48,441 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-07-09 17:14:48,441 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 17:14:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-07-09 17:14:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:48,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:48,444 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:48,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:48,644 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-07-09 17:14:48,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:48,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476348009] [2021-07-09 17:14:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:48,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476348009] [2021-07-09 17:14:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476348009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504671139] [2021-07-09 17:14:48,699 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 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 17:14:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:49,015 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:49,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:49,015 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 17:14:50,378 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 240 [2021-07-09 17:14:50,555 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-07-09 17:14:50,691 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-07-09 17:14:50,893 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-07-09 17:14:51,019 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 236 [2021-07-09 17:14:51,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:51,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:51,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:51,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:51,632 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 17:14:51,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504671139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:51,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:51,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:51,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314497005] [2021-07-09 17:14:51,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:51,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:51,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:51,633 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 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 17:14:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:51,881 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-07-09 17:14:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:51,881 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 21 [2021-07-09 17:14:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:51,886 INFO L225 Difference]: With dead ends: 3580 [2021-07-09 17:14:51,886 INFO L226 Difference]: Without dead ends: 3576 [2021-07-09 17:14:51,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-07-09 17:14:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-07-09 17:14:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-07-09 17:14:51,923 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-07-09 17:14:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:51,924 INFO L482 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-07-09 17:14:51,924 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 17:14:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-07-09 17:14:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:51,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:51,927 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:52,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4195 [2021-07-09 17:14:52,127 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-07-09 17:14:52,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:52,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150591498] [2021-07-09 17:14:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:52,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:52,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150591498] [2021-07-09 17:14:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150591498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:52,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694881077] [2021-07-09 17:14:52,181 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 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 17:14:52,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:52,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:52,520 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:52,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:52,521 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 17:14:53,884 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 235 [2021-07-09 17:14:54,735 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-07-09 17:14:54,962 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-07-09 17:14:55,195 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 334 [2021-07-09 17:14:55,367 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 378 [2021-07-09 17:14:56,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:56,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:56,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:56,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:14:56,140 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 17:14:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694881077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:56,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:56,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:14:56,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369417257] [2021-07-09 17:14:56,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:14:56,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:14:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:56,141 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 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 17:14:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:56,393 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-07-09 17:14:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:14:56,393 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 21 [2021-07-09 17:14:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:56,398 INFO L225 Difference]: With dead ends: 3937 [2021-07-09 17:14:56,398 INFO L226 Difference]: Without dead ends: 3934 [2021-07-09 17:14:56,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-07-09 17:14:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-07-09 17:14:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-07-09 17:14:56,441 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-07-09 17:14:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:56,441 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-07-09 17:14:56,441 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 17:14:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-07-09 17:14:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:14:56,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:56,445 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:56,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4581,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:56,645 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-07-09 17:14:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:56,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585641426] [2021-07-09 17:14:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:56,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:56,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585641426] [2021-07-09 17:14:56,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585641426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88337155] [2021-07-09 17:14:56,699 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 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 17:14:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:14:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:14:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:57,026 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:14:57,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:57,027 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 17:14:57,708 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-07-09 17:14:57,855 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-07-09 17:14:58,001 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-07-09 17:14:58,175 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 308 [2021-07-09 17:14:58,493 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 371 [2021-07-09 17:14:58,622 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 286 [2021-07-09 17:14:58,834 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 343 [2021-07-09 17:14:58,995 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 296 [2021-07-09 17:14:59,097 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 209 [2021-07-09 17:14:59,670 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 208 [2021-07-09 17:15:00,115 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 300 [2021-07-09 17:15:01,030 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 222 [2021-07-09 17:15:02,227 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 236 [2021-07-09 17:15:02,445 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 342 [2021-07-09 17:15:02,859 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 494 [2021-07-09 17:15:03,564 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 728 [2021-07-09 17:15:03,736 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 338 [2021-07-09 17:15:03,856 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-07-09 17:15:04,005 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 347 [2021-07-09 17:15:04,509 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 185 [2021-07-09 17:15:04,737 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 309 [2021-07-09 17:15:05,281 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-09 17:15:05,963 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-07-09 17:15:06,255 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 449 [2021-07-09 17:15:06,745 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 568 [2021-07-09 17:15:07,610 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 263 [2021-07-09 17:15:08,404 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 763 [2021-07-09 17:15:08,596 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 273 [2021-07-09 17:15:09,917 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 274 [2021-07-09 17:15:10,186 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 376 [2021-07-09 17:15:10,974 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 495 [2021-07-09 17:15:12,374 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1457 DAG size of output: 1160 [2021-07-09 17:15:14,728 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 2117 DAG size of output: 1722 [2021-07-09 17:15:17,384 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 2126 DAG size of output: 1700 [2021-07-09 17:15:20,222 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 2297 DAG size of output: 1855 [2021-07-09 17:15:23,460 WARN L205 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 2314 DAG size of output: 1868 [2021-07-09 17:15:27,211 WARN L205 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-07-09 17:15:30,966 WARN L205 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-07-09 17:15:35,041 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 2413 DAG size of output: 1935 [2021-07-09 17:15:40,020 WARN L205 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1926 [2021-07-09 17:15:40,185 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 1913 [2021-07-09 17:15:40,382 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 292 [2021-07-09 17:15:40,541 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 247 [2021-07-09 17:15:40,665 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 272 [2021-07-09 17:15:42,020 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 224 [2021-07-09 17:15:43,279 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 271 [2021-07-09 17:15:43,539 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 324 [2021-07-09 17:15:44,299 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 474 [2021-07-09 17:15:46,929 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 1831 DAG size of output: 1691 [2021-07-09 17:15:48,463 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1637 [2021-07-09 17:15:48,670 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1484 [2021-07-09 17:15:49,854 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 428 [2021-07-09 17:15:50,230 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 471 [2021-07-09 17:15:51,289 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-07-09 17:15:51,413 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-07-09 17:15:51,725 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 935 [2021-07-09 17:15:52,586 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 562 [2021-07-09 17:15:52,979 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 370 [2021-07-09 17:15:53,408 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 325 [2021-07-09 17:15:53,541 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 216 [2021-07-09 17:15:54,047 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-07-09 17:15:54,215 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-07-09 17:15:54,357 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 299 [2021-07-09 17:15:54,491 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 177 [2021-07-09 17:15:55,335 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 457 [2021-07-09 17:15:55,860 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 748 [2021-07-09 17:15:56,090 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 269 [2021-07-09 17:15:56,670 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 225 [2021-07-09 17:15:56,822 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 238 [2021-07-09 17:15:57,512 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 265 [2021-07-09 17:15:57,699 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 297 [2021-07-09 17:15:58,549 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 987 [2021-07-09 17:15:59,780 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1941 DAG size of output: 1041 [2021-07-09 17:16:01,405 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 2661 DAG size of output: 1346 [2021-07-09 17:16:03,327 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-07-09 17:16:05,226 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-07-09 17:16:07,228 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 2695 DAG size of output: 1379 [2021-07-09 17:16:09,347 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1259 [2021-07-09 17:16:10,462 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 913 DAG size of output: 759 [2021-07-09 17:16:11,266 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 234 [2021-07-09 17:16:11,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:16:11,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:16:11,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:16:11,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:16:11,653 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 17:16:11,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88337155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:11,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:11,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:16:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597573662] [2021-07-09 17:16:11,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:16:11,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:16:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:11,653 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 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 17:16:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:11,864 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-07-09 17:16:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:11,864 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 21 [2021-07-09 17:16:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:11,869 INFO L225 Difference]: With dead ends: 4316 [2021-07-09 17:16:11,870 INFO L226 Difference]: Without dead ends: 4313 [2021-07-09 17:16:11,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-07-09 17:16:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-07-09 17:16:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-07-09 17:16:11,938 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-07-09 17:16:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:11,938 INFO L482 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-07-09 17:16:11,938 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 17:16:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-07-09 17:16:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:11,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:11,942 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:12,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5056 [2021-07-09 17:16:12,143 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-07-09 17:16:12,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:12,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102919658] [2021-07-09 17:16:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:12,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102919658] [2021-07-09 17:16:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102919658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750574117] [2021-07-09 17:16:12,203 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 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 17:16:12,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:12,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:16:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:12,532 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 17:16:12,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:16:12,532 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 17:16:13,318 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 261 [2021-07-09 17:16:13,952 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 244 [2021-07-09 17:16:14,094 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 304 [2021-07-09 17:16:14,238 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 325 [2021-07-09 17:16:14,534 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-07-09 17:16:14,823 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-07-09 17:16:15,157 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 479 [2021-07-09 17:16:15,654 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 581 [2021-07-09 17:16:16,468 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 648 [2021-07-09 17:16:16,869 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 467 [2021-07-09 17:16:17,160 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 303 [2021-07-09 17:16:17,822 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 257 [2021-07-09 17:16:18,019 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 329 [2021-07-09 17:16:19,200 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 173 [2021-07-09 17:16:19,733 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 269 [2021-07-09 17:16:20,076 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 464 [2021-07-09 17:16:20,718 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 644 [2021-07-09 17:16:21,176 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 547 [2021-07-09 17:16:22,296 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2021-07-09 17:16:22,487 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 232 [2021-07-09 17:16:23,055 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 275 [2021-07-09 17:16:23,298 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2021-07-09 17:16:23,722 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 235 [2021-07-09 17:16:23,955 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 262 [2021-07-09 17:16:24,294 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 348 [2021-07-09 17:16:24,966 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 571 [2021-07-09 17:16:25,737 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 224 [2021-07-09 17:16:26,663 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 357 [2021-07-09 17:16:27,716 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1093 DAG size of output: 799 [2021-07-09 17:16:29,368 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 1557 DAG size of output: 1132 [2021-07-09 17:16:29,721 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 453 [2021-07-09 17:16:30,307 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 540 [2021-07-09 17:16:30,908 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2021-07-09 17:16:31,032 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 216 [2021-07-09 17:16:32,438 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 298 [2021-07-09 17:16:32,701 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 390 [2021-07-09 17:16:33,675 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 598 [2021-07-09 17:16:34,414 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 243 [2021-07-09 17:16:34,578 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 265 [2021-07-09 17:16:34,746 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 288 [2021-07-09 17:16:35,139 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 233 [2021-07-09 17:16:35,406 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 154 [2021-07-09 17:16:35,697 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 272 [2021-07-09 17:16:35,812 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 275 [2021-07-09 17:16:36,012 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 350 [2021-07-09 17:16:36,318 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 447 [2021-07-09 17:16:36,529 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 240 [2021-07-09 17:16:37,090 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-07-09 17:16:37,590 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 727 DAG size of output: 614 [2021-07-09 17:16:38,241 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 238 [2021-07-09 17:16:39,125 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 910 [2021-07-09 17:16:40,785 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1515 DAG size of output: 1270 [2021-07-09 17:16:42,844 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1698 DAG size of output: 1431 [2021-07-09 17:16:47,139 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-07-09 17:16:51,456 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-07-09 17:16:56,119 WARN L205 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 2771 DAG size of output: 2217 [2021-07-09 17:16:56,903 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 2217 DAG size of output: 1860 [2021-07-09 17:16:59,515 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 1349 DAG size of output: 1709 [2021-07-09 17:16:59,796 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 424 [2021-07-09 17:16:59,987 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 280 [2021-07-09 17:17:00,416 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 258 [2021-07-09 17:17:00,862 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 251 [2021-07-09 17:17:01,064 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 263 [2021-07-09 17:17:01,496 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 1145 DAG size of output: 624 [2021-07-09 17:17:02,443 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 580 [2021-07-09 17:17:02,942 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 253 [2021-07-09 17:17:03,402 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 289 [2021-07-09 17:17:03,614 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 371 [2021-07-09 17:17:03,957 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 476 [2021-07-09 17:17:04,443 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 562 [2021-07-09 17:17:04,915 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 491 [2021-07-09 17:17:05,083 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 313 [2021-07-09 17:17:05,722 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 243 [2021-07-09 17:17:06,235 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 304 [2021-07-09 17:17:06,590 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 461 [2021-07-09 17:17:06,767 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 329 [2021-07-09 17:17:07,218 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 224 [2021-07-09 17:17:07,798 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 310 [2021-07-09 17:17:08,173 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 496 [2021-07-09 17:17:09,161 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-07-09 17:17:10,181 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-07-09 17:17:11,259 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1845 DAG size of output: 928 [2021-07-09 17:17:12,421 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 930 DAG size of output: 1088 [2021-07-09 17:17:12,750 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 261 [2021-07-09 17:17:13,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:17:13,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:17:13,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:17:13,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-09 17:17:13,817 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 17:17:13,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750574117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:13,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:13,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 17:17:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754303897] [2021-07-09 17:17:13,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:17:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:17:13,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:13,818 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 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 17:17:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:14,088 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-07-09 17:17:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:14,089 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 21 [2021-07-09 17:17:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:14,095 INFO L225 Difference]: With dead ends: 4620 [2021-07-09 17:17:14,095 INFO L226 Difference]: Without dead ends: 4617 [2021-07-09 17:17:14,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-07-09 17:17:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-07-09 17:17:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-07-09 17:17:14,155 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-07-09 17:17:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:14,155 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-07-09 17:17:14,155 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 17:17:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-07-09 17:17:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:14,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:14,159 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:14,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7776 [2021-07-09 17:17:14,360 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-07-09 17:17:14,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:14,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810052832] [2021-07-09 17:17:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:14,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810052832] [2021-07-09 17:17:14,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810052832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81814272] [2021-07-09 17:17:14,447 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 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 17:17:14,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81814272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:14,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:14,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:17:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88810463] [2021-07-09 17:17:14,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:14,509 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:17:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:14,792 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-07-09 17:17:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:17:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:17:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:14,799 INFO L225 Difference]: With dead ends: 4872 [2021-07-09 17:17:14,799 INFO L226 Difference]: Without dead ends: 4863 [2021-07-09 17:17:14,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:17:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-07-09 17:17:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-07-09 17:17:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-07-09 17:17:14,862 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-07-09 17:17:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:14,862 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-07-09 17:17:14,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:17:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-07-09 17:17:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:14,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:14,867 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:15,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9859,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:15,068 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-07-09 17:17:15,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:15,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974743947] [2021-07-09 17:17:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:15,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:15,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974743947] [2021-07-09 17:17:15,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974743947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177061659] [2021-07-09 17:17:15,129 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 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 17:17:15,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:17:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177061659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:15,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:15,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963879638] [2021-07-09 17:17:15,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:15,193 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 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 17:17:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:15,260 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-07-09 17:17:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:17:15,260 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 22 [2021-07-09 17:17:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:15,266 INFO L225 Difference]: With dead ends: 5002 [2021-07-09 17:17:15,266 INFO L226 Difference]: Without dead ends: 5002 [2021-07-09 17:17:15,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-07-09 17:17:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-07-09 17:17:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-07-09 17:17:15,329 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-07-09 17:17:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:15,329 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-07-09 17:17:15,329 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 17:17:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-07-09 17:17:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:15,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:15,334 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:15,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9860 [2021-07-09 17:17:15,534 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-07-09 17:17:15,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579597743] [2021-07-09 17:17:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:15,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579597743] [2021-07-09 17:17:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579597743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451164460] [2021-07-09 17:17:15,594 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 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 17:17:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:15,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451164460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:15,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:15,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649596341] [2021-07-09 17:17:15,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:15,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:15,648 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 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 17:17:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:15,826 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-07-09 17:17:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:15,826 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 22 [2021-07-09 17:17:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:15,832 INFO L225 Difference]: With dead ends: 4827 [2021-07-09 17:17:15,832 INFO L226 Difference]: Without dead ends: 4825 [2021-07-09 17:17:15,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-07-09 17:17:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-07-09 17:17:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-07-09 17:17:15,893 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-07-09 17:17:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:15,893 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-07-09 17:17:15,893 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 17:17:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-07-09 17:17:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:15,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:15,898 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:16,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9861,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:16,098 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-07-09 17:17:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406077449] [2021-07-09 17:17:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:16,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:16,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406077449] [2021-07-09 17:17:16,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406077449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967705956] [2021-07-09 17:17:16,161 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 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 17:17:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:16,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967705956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:16,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214118420] [2021-07-09 17:17:16,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:16,226 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 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 17:17:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:16,295 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-07-09 17:17:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:17:16,295 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 22 [2021-07-09 17:17:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:16,303 INFO L225 Difference]: With dead ends: 5088 [2021-07-09 17:17:16,303 INFO L226 Difference]: Without dead ends: 5088 [2021-07-09 17:17:16,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-07-09 17:17:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-07-09 17:17:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-07-09 17:17:16,368 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-07-09 17:17:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:16,368 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-07-09 17:17:16,368 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 17:17:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-07-09 17:17:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:16,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:16,373 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:16,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9862 [2021-07-09 17:17:16,573 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-07-09 17:17:16,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778882147] [2021-07-09 17:17:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:16,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:16,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778882147] [2021-07-09 17:17:16,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778882147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251286349] [2021-07-09 17:17:16,640 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 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 17:17:16,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:17:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:16,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251286349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:16,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:16,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418887678] [2021-07-09 17:17:16,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:16,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:16,708 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 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 17:17:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:16,793 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-07-09 17:17:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:16,793 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 22 [2021-07-09 17:17:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:16,800 INFO L225 Difference]: With dead ends: 5431 [2021-07-09 17:17:16,800 INFO L226 Difference]: Without dead ends: 5431 [2021-07-09 17:17:16,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-07-09 17:17:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-07-09 17:17:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-07-09 17:17:16,866 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-07-09 17:17:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:16,866 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-07-09 17:17:16,866 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 17:17:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-07-09 17:17:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:16,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:16,871 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:17,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9863 [2021-07-09 17:17:17,071 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-07-09 17:17:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:17,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099857891] [2021-07-09 17:17:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:17,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099857891] [2021-07-09 17:17:17,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099857891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375510566] [2021-07-09 17:17:17,132 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 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 17:17:17,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375510566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:17,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:17,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206530912] [2021-07-09 17:17:17,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:17,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:17,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:17,188 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 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 17:17:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:17,338 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-07-09 17:17:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:17,339 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 22 [2021-07-09 17:17:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:17,346 INFO L225 Difference]: With dead ends: 4816 [2021-07-09 17:17:17,346 INFO L226 Difference]: Without dead ends: 4814 [2021-07-09 17:17:17,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-07-09 17:17:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-07-09 17:17:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-07-09 17:17:17,412 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-07-09 17:17:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:17,413 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-07-09 17:17:17,413 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 17:17:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-07-09 17:17:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:17,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:17,417 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:17,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9864,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:17,618 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-07-09 17:17:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:17,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480007235] [2021-07-09 17:17:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:17,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480007235] [2021-07-09 17:17:17,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480007235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384626549] [2021-07-09 17:17:17,675 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 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 17:17:17,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:17,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:17,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:17,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:17,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384626549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:17,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:17,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:17,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35803147] [2021-07-09 17:17:17,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:17,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:17,737 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 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 17:17:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:17,807 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-07-09 17:17:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:17:17,808 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 22 [2021-07-09 17:17:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:17,815 INFO L225 Difference]: With dead ends: 5117 [2021-07-09 17:17:17,815 INFO L226 Difference]: Without dead ends: 5117 [2021-07-09 17:17:17,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-09 17:17:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-07-09 17:17:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-07-09 17:17:17,886 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-07-09 17:17:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:17,886 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-07-09 17:17:17,886 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 17:17:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-07-09 17:17:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:17,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:17,891 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:18,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9865 [2021-07-09 17:17:18,091 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-07-09 17:17:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:18,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398679852] [2021-07-09 17:17:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:18,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:18,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398679852] [2021-07-09 17:17:18,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398679852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449713658] [2021-07-09 17:17:18,147 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 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 17:17:18,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:17:18,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:18,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449713658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:18,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:18,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902367106] [2021-07-09 17:17:18,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:18,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:18,214 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 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 17:17:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:18,316 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-07-09 17:17:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:18,317 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 22 [2021-07-09 17:17:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:18,325 INFO L225 Difference]: With dead ends: 5624 [2021-07-09 17:17:18,325 INFO L226 Difference]: Without dead ends: 5624 [2021-07-09 17:17:18,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-07-09 17:17:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-07-09 17:17:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-07-09 17:17:18,395 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-07-09 17:17:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:18,395 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-07-09 17:17:18,396 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 17:17:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-07-09 17:17:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:18,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:18,401 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:18,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9866,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:18,601 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-07-09 17:17:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:18,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686937234] [2021-07-09 17:17:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:18,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:18,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686937234] [2021-07-09 17:17:18,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686937234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781192017] [2021-07-09 17:17:18,661 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 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 17:17:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781192017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:18,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994400639] [2021-07-09 17:17:18,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:18,731 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 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 17:17:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:18,849 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-07-09 17:17:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:17:18,849 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 22 [2021-07-09 17:17:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:18,861 INFO L225 Difference]: With dead ends: 7402 [2021-07-09 17:17:18,861 INFO L226 Difference]: Without dead ends: 7402 [2021-07-09 17:17:18,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-07-09 17:17:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-07-09 17:17:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-07-09 17:17:18,963 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-07-09 17:17:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:18,963 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-07-09 17:17:18,963 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 17:17:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-07-09 17:17:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:18,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:18,969 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:19,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9867 [2021-07-09 17:17:19,170 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-07-09 17:17:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:19,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291005013] [2021-07-09 17:17:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:19,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291005013] [2021-07-09 17:17:19,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291005013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252363668] [2021-07-09 17:17:19,262 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 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 17:17:19,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:19,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:19,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252363668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:19,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234050109] [2021-07-09 17:17:19,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:19,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:19,322 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 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 17:17:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:19,474 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-07-09 17:17:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:19,474 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 22 [2021-07-09 17:17:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:19,483 INFO L225 Difference]: With dead ends: 6467 [2021-07-09 17:17:19,483 INFO L226 Difference]: Without dead ends: 6465 [2021-07-09 17:17:19,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-07-09 17:17:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-07-09 17:17:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-07-09 17:17:19,576 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-07-09 17:17:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:19,576 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-07-09 17:17:19,576 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 17:17:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-07-09 17:17:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:19,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:19,582 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:19,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:19,783 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:19,783 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-07-09 17:17:19,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:19,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982947378] [2021-07-09 17:17:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:19,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982947378] [2021-07-09 17:17:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982947378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545608109] [2021-07-09 17:17:19,841 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 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 17:17:19,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:17:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545608109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:19,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:19,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104287690] [2021-07-09 17:17:19,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:19,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:19,903 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 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 17:17:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:19,973 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-07-09 17:17:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:17:19,974 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 22 [2021-07-09 17:17:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:19,982 INFO L225 Difference]: With dead ends: 6454 [2021-07-09 17:17:19,982 INFO L226 Difference]: Without dead ends: 6454 [2021-07-09 17:17:19,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-07-09 17:17:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-07-09 17:17:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-07-09 17:17:20,073 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-07-09 17:17:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:20,073 INFO L482 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-07-09 17:17:20,074 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 17:17:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-07-09 17:17:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:20,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:20,079 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9869,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:20,280 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-07-09 17:17:20,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:20,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213472652] [2021-07-09 17:17:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:20,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:20,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213472652] [2021-07-09 17:17:20,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213472652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453158738] [2021-07-09 17:17:20,336 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 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 17:17:20,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453158738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:20,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:20,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112922264] [2021-07-09 17:17:20,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:20,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:20,397 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 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 17:17:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:20,491 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-07-09 17:17:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:20,492 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 22 [2021-07-09 17:17:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:20,503 INFO L225 Difference]: With dead ends: 7159 [2021-07-09 17:17:20,503 INFO L226 Difference]: Without dead ends: 7159 [2021-07-09 17:17:20,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-07-09 17:17:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-07-09 17:17:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-07-09 17:17:20,604 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-07-09 17:17:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:20,604 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-07-09 17:17:20,604 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 17:17:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-07-09 17:17:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:20,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:20,610 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:20,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:20,810 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-07-09 17:17:20,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:20,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873263795] [2021-07-09 17:17:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:20,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873263795] [2021-07-09 17:17:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873263795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515709902] [2021-07-09 17:17:20,870 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 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 17:17:20,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:20,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:20,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515709902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:20,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:20,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941988761] [2021-07-09 17:17:20,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:20,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:20,935 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 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 17:17:21,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:21,041 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-07-09 17:17:21,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:21,042 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 22 [2021-07-09 17:17:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:21,058 INFO L225 Difference]: With dead ends: 10072 [2021-07-09 17:17:21,058 INFO L226 Difference]: Without dead ends: 10072 [2021-07-09 17:17:21,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-07-09 17:17:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-07-09 17:17:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-07-09 17:17:21,199 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-07-09 17:17:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:21,200 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-07-09 17:17:21,200 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 17:17:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-07-09 17:17:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:21,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:21,208 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:21,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:21,409 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-07-09 17:17:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:21,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86855459] [2021-07-09 17:17:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:21,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86855459] [2021-07-09 17:17:21,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86855459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944876779] [2021-07-09 17:17:21,476 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 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 17:17:21,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:17:21,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:21,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:21,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944876779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:21,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:21,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070466602] [2021-07-09 17:17:21,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:21,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:21,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:21,538 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 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 17:17:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:21,712 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-07-09 17:17:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:21,712 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 22 [2021-07-09 17:17:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:21,736 INFO L225 Difference]: With dead ends: 13143 [2021-07-09 17:17:21,737 INFO L226 Difference]: Without dead ends: 13143 [2021-07-09 17:17:21,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-07-09 17:17:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-07-09 17:17:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-07-09 17:17:22,006 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-07-09 17:17:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:22,006 INFO L482 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-07-09 17:17:22,006 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 17:17:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-07-09 17:17:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:22,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:22,015 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:22,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9872 [2021-07-09 17:17:22,216 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-07-09 17:17:22,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:22,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297760854] [2021-07-09 17:17:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:22,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:22,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297760854] [2021-07-09 17:17:22,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297760854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:22,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383845918] [2021-07-09 17:17:22,268 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 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 17:17:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:22,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:17:22,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383845918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:22,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:22,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:17:22,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243506411] [2021-07-09 17:17:22,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:22,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:22,326 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:22,482 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-07-09 17:17:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:17:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:17:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:22,504 INFO L225 Difference]: With dead ends: 12000 [2021-07-09 17:17:22,504 INFO L226 Difference]: Without dead ends: 11996 [2021-07-09 17:17:22,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-07-09 17:17:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-07-09 17:17:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-07-09 17:17:22,694 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-07-09 17:17:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:22,694 INFO L482 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-07-09 17:17:22,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-07-09 17:17:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:22,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:22,705 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:22,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9873 [2021-07-09 17:17:22,905 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-07-09 17:17:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:22,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510504195] [2021-07-09 17:17:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:22,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510504195] [2021-07-09 17:17:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510504195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611365641] [2021-07-09 17:17:22,958 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 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 17:17:22,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:22,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611365641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:23,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:23,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680045719] [2021-07-09 17:17:23,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:23,018 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 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 17:17:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:23,155 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-07-09 17:17:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:23,156 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 22 [2021-07-09 17:17:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:23,185 INFO L225 Difference]: With dead ends: 14397 [2021-07-09 17:17:23,185 INFO L226 Difference]: Without dead ends: 14397 [2021-07-09 17:17:23,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:17:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-07-09 17:17:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-07-09 17:17:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-07-09 17:17:23,445 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-07-09 17:17:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:23,445 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-07-09 17:17:23,445 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 17:17:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-07-09 17:17:23,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:23,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:23,456 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:23,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9874,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:23,657 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-07-09 17:17:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245536674] [2021-07-09 17:17:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:23,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:23,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245536674] [2021-07-09 17:17:23,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245536674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:23,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216989833] [2021-07-09 17:17:23,713 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 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 17:17:23,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:17:23,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:23,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:23,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216989833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:23,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:23,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016361905] [2021-07-09 17:17:23,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:23,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:23,783 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 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 17:17:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:23,947 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-07-09 17:17:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:23,948 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 22 [2021-07-09 17:17:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:23,979 INFO L225 Difference]: With dead ends: 15242 [2021-07-09 17:17:23,979 INFO L226 Difference]: Without dead ends: 15242 [2021-07-09 17:17:23,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-07-09 17:17:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-07-09 17:17:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-07-09 17:17:24,165 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-07-09 17:17:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:24,165 INFO L482 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-07-09 17:17:24,165 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 17:17:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-07-09 17:17:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:24,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:24,172 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:24,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9875 [2021-07-09 17:17:24,372 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-07-09 17:17:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:24,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711660990] [2021-07-09 17:17:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:24,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:24,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711660990] [2021-07-09 17:17:24,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711660990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:24,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376429928] [2021-07-09 17:17:24,439 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 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 17:17:24,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:24,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:24,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376429928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:24,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:24,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551355779] [2021-07-09 17:17:24,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:24,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:24,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:24,508 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 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 17:17:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:24,686 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-07-09 17:17:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:24,686 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 22 [2021-07-09 17:17:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:24,703 INFO L225 Difference]: With dead ends: 9785 [2021-07-09 17:17:24,703 INFO L226 Difference]: Without dead ends: 9785 [2021-07-09 17:17:24,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-07-09 17:17:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-07-09 17:17:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-07-09 17:17:24,859 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-07-09 17:17:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:24,859 INFO L482 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-07-09 17:17:24,859 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 17:17:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-07-09 17:17:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:24,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:24,866 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:25,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9876,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:25,066 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-07-09 17:17:25,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:25,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809813571] [2021-07-09 17:17:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:25,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809813571] [2021-07-09 17:17:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809813571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673801697] [2021-07-09 17:17:25,119 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 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 17:17:25,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:17:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:25,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673801697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:25,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:25,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732527479] [2021-07-09 17:17:25,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:25,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:25,182 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 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 17:17:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:25,363 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-07-09 17:17:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:25,363 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 22 [2021-07-09 17:17:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:25,377 INFO L225 Difference]: With dead ends: 6765 [2021-07-09 17:17:25,377 INFO L226 Difference]: Without dead ends: 6761 [2021-07-09 17:17:25,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-07-09 17:17:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-07-09 17:17:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-07-09 17:17:25,480 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-07-09 17:17:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:25,481 INFO L482 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-07-09 17:17:25,481 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 17:17:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-07-09 17:17:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:25,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:25,487 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:25,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9877 [2021-07-09 17:17:25,688 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-07-09 17:17:25,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:25,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764084716] [2021-07-09 17:17:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:25,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764084716] [2021-07-09 17:17:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764084716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049672951] [2021-07-09 17:17:25,744 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 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 17:17:25,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:17:25,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:25,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049672951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:25,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:25,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114860758] [2021-07-09 17:17:25,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:25,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:25,842 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 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 17:17:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:25,947 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-07-09 17:17:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:17:25,948 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 22 [2021-07-09 17:17:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:25,959 INFO L225 Difference]: With dead ends: 6899 [2021-07-09 17:17:25,959 INFO L226 Difference]: Without dead ends: 6899 [2021-07-09 17:17:25,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-09 17:17:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-07-09 17:17:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-07-09 17:17:26,205 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-07-09 17:17:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:26,205 INFO L482 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-07-09 17:17:26,205 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 17:17:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-07-09 17:17:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:26,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:26,212 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:26,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9878,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:26,412 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-07-09 17:17:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:26,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985677391] [2021-07-09 17:17:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:26,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985677391] [2021-07-09 17:17:26,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985677391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54590040] [2021-07-09 17:17:26,486 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 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 17:17:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:26,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:26,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54590040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:26,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:26,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692724742] [2021-07-09 17:17:26,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:26,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:26,555 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 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 17:17:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:26,653 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-07-09 17:17:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:17:26,654 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 22 [2021-07-09 17:17:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:26,664 INFO L225 Difference]: With dead ends: 6620 [2021-07-09 17:17:26,664 INFO L226 Difference]: Without dead ends: 6620 [2021-07-09 17:17:26,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-07-09 17:17:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-07-09 17:17:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-07-09 17:17:26,757 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-07-09 17:17:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:26,758 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-07-09 17:17:26,758 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 17:17:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-07-09 17:17:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:26,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:26,764 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:26,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9879,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:26,964 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-07-09 17:17:26,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:26,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518159419] [2021-07-09 17:17:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:27,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518159419] [2021-07-09 17:17:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518159419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438944681] [2021-07-09 17:17:27,029 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 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 17:17:27,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:27,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:27,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438944681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:27,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:27,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780898169] [2021-07-09 17:17:27,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:27,104 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:27,231 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-07-09 17:17:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:27,246 INFO L225 Difference]: With dead ends: 7662 [2021-07-09 17:17:27,246 INFO L226 Difference]: Without dead ends: 7662 [2021-07-09 17:17:27,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-07-09 17:17:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-07-09 17:17:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-07-09 17:17:27,352 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-07-09 17:17:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:27,352 INFO L482 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-07-09 17:17:27,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-07-09 17:17:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:27,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:27,359 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:27,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9880,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:27,559 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-07-09 17:17:27,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:27,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706994417] [2021-07-09 17:17:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:27,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706994417] [2021-07-09 17:17:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706994417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87290876] [2021-07-09 17:17:27,626 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 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 17:17:27,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:17:27,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:27,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87290876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:27,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405879944] [2021-07-09 17:17:27,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:27,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:27,705 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:27,857 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-07-09 17:17:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:27,879 INFO L225 Difference]: With dead ends: 9995 [2021-07-09 17:17:27,880 INFO L226 Difference]: Without dead ends: 9995 [2021-07-09 17:17:27,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:17:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-07-09 17:17:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-07-09 17:17:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-07-09 17:17:28,073 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-07-09 17:17:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:28,073 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-07-09 17:17:28,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-07-09 17:17:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:28,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:28,079 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:28,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9881 [2021-07-09 17:17:28,279 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-07-09 17:17:28,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:28,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094958758] [2021-07-09 17:17:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:28,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094958758] [2021-07-09 17:17:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094958758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326527344] [2021-07-09 17:17:28,349 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 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 17:17:28,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:28,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326527344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:28,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925270852] [2021-07-09 17:17:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:28,423 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:28,641 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-07-09 17:17:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:28,662 INFO L225 Difference]: With dead ends: 11660 [2021-07-09 17:17:28,662 INFO L226 Difference]: Without dead ends: 11660 [2021-07-09 17:17:28,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:17:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-07-09 17:17:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-07-09 17:17:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-07-09 17:17:28,833 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-07-09 17:17:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:28,833 INFO L482 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-07-09 17:17:28,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-07-09 17:17:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:28,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:28,842 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:29,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9882,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:29,042 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-07-09 17:17:29,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:29,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583060393] [2021-07-09 17:17:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:29,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583060393] [2021-07-09 17:17:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583060393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:29,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056608432] [2021-07-09 17:17:29,087 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 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 17:17:29,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:17:29,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056608432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:29,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:29,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:17:29,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991520394] [2021-07-09 17:17:29,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:29,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:29,150 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:29,312 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-07-09 17:17:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:17:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 17:17:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:29,326 INFO L225 Difference]: With dead ends: 9612 [2021-07-09 17:17:29,326 INFO L226 Difference]: Without dead ends: 9608 [2021-07-09 17:17:29,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-07-09 17:17:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-07-09 17:17:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-07-09 17:17:29,458 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-07-09 17:17:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:29,458 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-07-09 17:17:29,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-07-09 17:17:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:29,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:29,467 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:29,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9883 [2021-07-09 17:17:29,667 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-07-09 17:17:29,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:29,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821829679] [2021-07-09 17:17:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:29,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821829679] [2021-07-09 17:17:29,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821829679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037656817] [2021-07-09 17:17:29,730 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 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 17:17:29,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:17:29,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:29,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037656817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:29,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:29,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:29,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539112594] [2021-07-09 17:17:29,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:29,801 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 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 17:17:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:29,979 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-07-09 17:17:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:29,980 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 22 [2021-07-09 17:17:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:30,004 INFO L225 Difference]: With dead ends: 12460 [2021-07-09 17:17:30,004 INFO L226 Difference]: Without dead ends: 12460 [2021-07-09 17:17:30,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-07-09 17:17:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-07-09 17:17:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-07-09 17:17:30,181 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-07-09 17:17:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:30,181 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-07-09 17:17:30,181 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 17:17:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-07-09 17:17:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:30,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:30,190 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:30,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9884 [2021-07-09 17:17:30,391 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-07-09 17:17:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:30,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428914027] [2021-07-09 17:17:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:30,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:30,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428914027] [2021-07-09 17:17:30,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428914027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:30,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384272984] [2021-07-09 17:17:30,446 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 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 17:17:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:30,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:30,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:30,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384272984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:30,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:30,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:30,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553114174] [2021-07-09 17:17:30,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:30,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:30,511 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:30,663 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-07-09 17:17:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:30,686 INFO L225 Difference]: With dead ends: 12909 [2021-07-09 17:17:30,686 INFO L226 Difference]: Without dead ends: 12909 [2021-07-09 17:17:30,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-07-09 17:17:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-07-09 17:17:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-07-09 17:17:30,908 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-07-09 17:17:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:30,908 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-07-09 17:17:30,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-07-09 17:17:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:30,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:30,913 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:31,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9885 [2021-07-09 17:17:31,113 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-07-09 17:17:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:31,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667360505] [2021-07-09 17:17:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:31,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667360505] [2021-07-09 17:17:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667360505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707621502] [2021-07-09 17:17:31,181 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 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 17:17:31,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:31,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707621502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209818429] [2021-07-09 17:17:31,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:31,261 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:31,500 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-07-09 17:17:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:31,523 INFO L225 Difference]: With dead ends: 9798 [2021-07-09 17:17:31,523 INFO L226 Difference]: Without dead ends: 9798 [2021-07-09 17:17:31,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:17:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-07-09 17:17:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-07-09 17:17:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-07-09 17:17:31,651 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-07-09 17:17:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:31,652 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-07-09 17:17:31,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-07-09 17:17:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:31,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:31,657 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:31,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-07-09 17:17:31,858 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-07-09 17:17:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:31,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224399318] [2021-07-09 17:17:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:31,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224399318] [2021-07-09 17:17:31,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224399318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052269556] [2021-07-09 17:17:31,918 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 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 17:17:31,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:17:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052269556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:31,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:31,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542369673] [2021-07-09 17:17:31,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:31,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:31,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:31,988 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 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 17:17:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:32,161 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-07-09 17:17:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:32,161 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 22 [2021-07-09 17:17:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:32,174 INFO L225 Difference]: With dead ends: 6116 [2021-07-09 17:17:32,174 INFO L226 Difference]: Without dead ends: 6112 [2021-07-09 17:17:32,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-07-09 17:17:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-07-09 17:17:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-07-09 17:17:32,269 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-07-09 17:17:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:32,269 INFO L482 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-07-09 17:17:32,269 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 17:17:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-07-09 17:17:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:32,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:32,275 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:32,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9887 [2021-07-09 17:17:32,476 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-07-09 17:17:32,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:32,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751582146] [2021-07-09 17:17:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:32,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751582146] [2021-07-09 17:17:32,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751582146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693910191] [2021-07-09 17:17:32,531 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 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 17:17:32,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:32,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:32,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693910191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:32,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:32,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:32,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878825477] [2021-07-09 17:17:32,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:32,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:32,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:32,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:32,597 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 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 17:17:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:32,699 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-07-09 17:17:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:32,700 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 22 [2021-07-09 17:17:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:32,711 INFO L225 Difference]: With dead ends: 6374 [2021-07-09 17:17:32,711 INFO L226 Difference]: Without dead ends: 6374 [2021-07-09 17:17:32,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-07-09 17:17:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-07-09 17:17:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-07-09 17:17:32,804 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-07-09 17:17:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:32,804 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-07-09 17:17:32,804 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 17:17:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-07-09 17:17:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:32,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:32,810 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:33,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9888,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:33,010 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-07-09 17:17:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:33,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020444523] [2021-07-09 17:17:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:33,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:33,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020444523] [2021-07-09 17:17:33,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020444523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:33,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882740824] [2021-07-09 17:17:33,065 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 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 17:17:33,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:33,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:33,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882740824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:33,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:33,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:33,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305486859] [2021-07-09 17:17:33,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:33,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:33,141 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 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 17:17:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:33,248 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-07-09 17:17:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:33,248 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 22 [2021-07-09 17:17:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:33,261 INFO L225 Difference]: With dead ends: 6454 [2021-07-09 17:17:33,261 INFO L226 Difference]: Without dead ends: 6454 [2021-07-09 17:17:33,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-07-09 17:17:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-07-09 17:17:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-07-09 17:17:33,354 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-07-09 17:17:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-07-09 17:17:33,354 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 17:17:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-07-09 17:17:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:33,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:33,360 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:33,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:33,560 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:33,560 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-07-09 17:17:33,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:33,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269750982] [2021-07-09 17:17:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:33,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269750982] [2021-07-09 17:17:33,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269750982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454154862] [2021-07-09 17:17:33,613 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 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 17:17:33,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:17:33,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454154862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:33,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:33,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:17:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585467358] [2021-07-09 17:17:33,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:33,680 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 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 17:17:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:33,773 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-07-09 17:17:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:17:33,774 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 22 [2021-07-09 17:17:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:33,790 INFO L225 Difference]: With dead ends: 9965 [2021-07-09 17:17:33,790 INFO L226 Difference]: Without dead ends: 9965 [2021-07-09 17:17:33,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-07-09 17:17:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-07-09 17:17:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-07-09 17:17:33,940 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-07-09 17:17:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:33,941 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-07-09 17:17:33,941 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 17:17:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-07-09 17:17:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:33,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:33,948 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:34,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9890,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:34,148 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:34,148 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-07-09 17:17:34,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:34,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419204818] [2021-07-09 17:17:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:34,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:34,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419204818] [2021-07-09 17:17:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419204818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512090770] [2021-07-09 17:17:34,206 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 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 17:17:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512090770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:34,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847991510] [2021-07-09 17:17:34,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:34,308 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:34,438 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-07-09 17:17:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:34,456 INFO L225 Difference]: With dead ends: 10632 [2021-07-09 17:17:34,457 INFO L226 Difference]: Without dead ends: 10632 [2021-07-09 17:17:34,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:17:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-07-09 17:17:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-07-09 17:17:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-07-09 17:17:34,610 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-07-09 17:17:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:34,610 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-07-09 17:17:34,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-07-09 17:17:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:34,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:34,616 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:34,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9891 [2021-07-09 17:17:34,817 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-07-09 17:17:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949491050] [2021-07-09 17:17:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:34,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:34,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949491050] [2021-07-09 17:17:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949491050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110054025] [2021-07-09 17:17:34,879 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 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 17:17:34,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:34,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110054025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:34,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:34,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719342908] [2021-07-09 17:17:34,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:34,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:34,944 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:35,115 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-07-09 17:17:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:35,144 INFO L225 Difference]: With dead ends: 14571 [2021-07-09 17:17:35,144 INFO L226 Difference]: Without dead ends: 14571 [2021-07-09 17:17:35,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:17:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-07-09 17:17:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-07-09 17:17:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-07-09 17:17:35,396 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-07-09 17:17:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:35,396 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-07-09 17:17:35,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-07-09 17:17:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:35,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:35,406 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:35,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9892 [2021-07-09 17:17:35,607 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-07-09 17:17:35,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:35,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556920126] [2021-07-09 17:17:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:35,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556920126] [2021-07-09 17:17:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556920126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768577593] [2021-07-09 17:17:35,675 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 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 17:17:35,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:17:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:35,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768577593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:35,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:35,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:17:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050104021] [2021-07-09 17:17:35,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:35,747 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:36,032 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-07-09 17:17:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:17:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:36,078 INFO L225 Difference]: With dead ends: 19456 [2021-07-09 17:17:36,078 INFO L226 Difference]: Without dead ends: 19456 [2021-07-09 17:17:36,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:17:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-07-09 17:17:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-07-09 17:17:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-07-09 17:17:36,442 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-07-09 17:17:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:36,442 INFO L482 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-07-09 17:17:36,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-07-09 17:17:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:36,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:36,454 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:36,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9893 [2021-07-09 17:17:36,655 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:36,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-07-09 17:17:36,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:36,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802736062] [2021-07-09 17:17:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:36,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:36,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802736062] [2021-07-09 17:17:36,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802736062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:36,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207586712] [2021-07-09 17:17:36,718 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 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 17:17:36,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:36,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207586712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:36,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:36,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589662929] [2021-07-09 17:17:36,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:36,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:36,778 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:37,057 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-07-09 17:17:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:17:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:37,102 INFO L225 Difference]: With dead ends: 24132 [2021-07-09 17:17:37,103 INFO L226 Difference]: Without dead ends: 24132 [2021-07-09 17:17:37,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:17:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-07-09 17:17:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-07-09 17:17:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-07-09 17:17:37,423 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-07-09 17:17:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:37,423 INFO L482 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-07-09 17:17:37,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-07-09 17:17:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:37,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:37,433 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:37,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:37,634 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-07-09 17:17:37,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:37,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745167133] [2021-07-09 17:17:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745167133] [2021-07-09 17:17:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745167133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164417430] [2021-07-09 17:17:37,698 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 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 17:17:37,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:37,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164417430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:37,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:37,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063767595] [2021-07-09 17:17:37,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:37,759 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:37,967 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-07-09 17:17:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:37,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:38,005 INFO L225 Difference]: With dead ends: 20948 [2021-07-09 17:17:38,005 INFO L226 Difference]: Without dead ends: 20948 [2021-07-09 17:17:38,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:17:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-07-09 17:17:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-07-09 17:17:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-07-09 17:17:38,351 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-07-09 17:17:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:38,352 INFO L482 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-07-09 17:17:38,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-07-09 17:17:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:38,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:38,361 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:38,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9895 [2021-07-09 17:17:38,562 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-07-09 17:17:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:38,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098569820] [2021-07-09 17:17:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:38,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098569820] [2021-07-09 17:17:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098569820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671592113] [2021-07-09 17:17:38,638 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 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 17:17:38,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:17:38,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671592113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:38,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:38,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:38,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301703202] [2021-07-09 17:17:38,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:38,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:38,700 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:39,002 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-07-09 17:17:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:17:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:39,061 INFO L225 Difference]: With dead ends: 28543 [2021-07-09 17:17:39,061 INFO L226 Difference]: Without dead ends: 28543 [2021-07-09 17:17:39,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:17:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-07-09 17:17:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-07-09 17:17:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-07-09 17:17:39,584 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-07-09 17:17:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:39,584 INFO L482 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-07-09 17:17:39,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-07-09 17:17:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:39,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:39,595 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:39,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9896 [2021-07-09 17:17:39,796 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-07-09 17:17:39,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:39,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856662389] [2021-07-09 17:17:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:39,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:39,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856662389] [2021-07-09 17:17:39,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856662389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:39,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466583052] [2021-07-09 17:17:39,845 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 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 17:17:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:39,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466583052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:39,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:39,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:39,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604076657] [2021-07-09 17:17:39,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:39,899 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 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 17:17:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:40,129 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-07-09 17:17:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:40,129 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 22 [2021-07-09 17:17:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:40,186 INFO L225 Difference]: With dead ends: 27245 [2021-07-09 17:17:40,187 INFO L226 Difference]: Without dead ends: 27241 [2021-07-09 17:17:40,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-07-09 17:17:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-07-09 17:17:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-07-09 17:17:40,706 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-07-09 17:17:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:40,706 INFO L482 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-07-09 17:17:40,706 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 17:17:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-07-09 17:17:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:40,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:40,717 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:40,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9897,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:40,925 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-07-09 17:17:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:40,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793872191] [2021-07-09 17:17:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:40,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793872191] [2021-07-09 17:17:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793872191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677927077] [2021-07-09 17:17:40,972 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 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 17:17:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:40,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677927077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:41,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:41,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:41,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270716985] [2021-07-09 17:17:41,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:41,031 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 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 17:17:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:41,249 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-07-09 17:17:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:41,250 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 22 [2021-07-09 17:17:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:41,304 INFO L225 Difference]: With dead ends: 27144 [2021-07-09 17:17:41,304 INFO L226 Difference]: Without dead ends: 27144 [2021-07-09 17:17:41,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-07-09 17:17:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-07-09 17:17:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-07-09 17:17:41,801 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-07-09 17:17:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:41,801 INFO L482 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-07-09 17:17:41,801 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 17:17:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-07-09 17:17:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:41,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:41,813 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:42,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9898 [2021-07-09 17:17:42,017 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-07-09 17:17:42,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:42,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130991171] [2021-07-09 17:17:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:42,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:42,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130991171] [2021-07-09 17:17:42,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130991171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:42,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460227170] [2021-07-09 17:17:42,069 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 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 17:17:42,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:17:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:42,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460227170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:42,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:42,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:42,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991409293] [2021-07-09 17:17:42,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:42,131 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 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 17:17:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:42,321 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-07-09 17:17:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:42,322 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 22 [2021-07-09 17:17:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:42,377 INFO L225 Difference]: With dead ends: 28314 [2021-07-09 17:17:42,377 INFO L226 Difference]: Without dead ends: 28314 [2021-07-09 17:17:42,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-07-09 17:17:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-07-09 17:17:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-07-09 17:17:42,984 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-07-09 17:17:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-07-09 17:17:42,985 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 17:17:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-07-09 17:17:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:42,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:42,995 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:43,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9899,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:43,196 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-07-09 17:17:43,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:43,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751984814] [2021-07-09 17:17:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:43,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751984814] [2021-07-09 17:17:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751984814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:43,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076748389] [2021-07-09 17:17:43,249 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 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 17:17:43,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:43,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:43,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076748389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:43,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:43,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247736027] [2021-07-09 17:17:43,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:43,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:43,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:43,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:43,309 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 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 17:17:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:43,530 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-07-09 17:17:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:43,530 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 22 [2021-07-09 17:17:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:43,621 INFO L225 Difference]: With dead ends: 40934 [2021-07-09 17:17:43,621 INFO L226 Difference]: Without dead ends: 40934 [2021-07-09 17:17:43,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-07-09 17:17:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-07-09 17:17:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-07-09 17:17:44,363 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-07-09 17:17:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:44,363 INFO L482 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-07-09 17:17:44,363 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 17:17:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-07-09 17:17:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:44,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:44,375 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9900,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:44,576 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-07-09 17:17:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:44,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970431015] [2021-07-09 17:17:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:44,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:44,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970431015] [2021-07-09 17:17:44,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970431015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:44,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973336278] [2021-07-09 17:17:44,632 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 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 17:17:44,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:17:44,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:44,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973336278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:44,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:44,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:44,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744441363] [2021-07-09 17:17:44,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:44,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:44,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:44,698 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 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 17:17:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:45,035 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-07-09 17:17:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:17:45,035 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 22 [2021-07-09 17:17:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:45,130 INFO L225 Difference]: With dead ends: 45762 [2021-07-09 17:17:45,130 INFO L226 Difference]: Without dead ends: 45762 [2021-07-09 17:17:45,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-07-09 17:17:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-07-09 17:17:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-07-09 17:17:46,029 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-07-09 17:17:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:46,029 INFO L482 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-07-09 17:17:46,029 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 17:17:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-07-09 17:17:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:46,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:46,045 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:46,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9901,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:46,246 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-07-09 17:17:46,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:46,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658961254] [2021-07-09 17:17:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:46,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:46,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658961254] [2021-07-09 17:17:46,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658961254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:46,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856784660] [2021-07-09 17:17:46,310 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 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 17:17:46,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:17:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:46,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856784660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:46,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:46,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498010939] [2021-07-09 17:17:46,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:46,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:46,374 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:46,827 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-07-09 17:17:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:47,026 INFO L225 Difference]: With dead ends: 46432 [2021-07-09 17:17:47,027 INFO L226 Difference]: Without dead ends: 46432 [2021-07-09 17:17:47,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-07-09 17:17:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-07-09 17:17:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-07-09 17:17:48,061 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-07-09 17:17:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:48,062 INFO L482 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-07-09 17:17:48,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-07-09 17:17:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:48,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:48,079 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:48,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9902,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:48,294 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-07-09 17:17:48,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:48,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317898677] [2021-07-09 17:17:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:48,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317898677] [2021-07-09 17:17:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317898677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618724495] [2021-07-09 17:17:48,363 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 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 17:17:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:48,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:48,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618724495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:48,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:48,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:48,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209702669] [2021-07-09 17:17:48,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:48,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:48,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:48,552 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:48,967 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-07-09 17:17:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:17:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:49,155 INFO L225 Difference]: With dead ends: 49791 [2021-07-09 17:17:49,155 INFO L226 Difference]: Without dead ends: 49791 [2021-07-09 17:17:49,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:17:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-07-09 17:17:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-07-09 17:17:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-07-09 17:17:50,501 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-07-09 17:17:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:50,501 INFO L482 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-07-09 17:17:50,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-07-09 17:17:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:50,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:50,519 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:50,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9903 [2021-07-09 17:17:50,719 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:50,719 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-07-09 17:17:50,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:50,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668515069] [2021-07-09 17:17:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:50,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:50,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668515069] [2021-07-09 17:17:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668515069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833838102] [2021-07-09 17:17:50,790 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 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 17:17:50,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833838102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:50,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:50,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:50,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756610100] [2021-07-09 17:17:50,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:50,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:50,854 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:51,380 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-07-09 17:17:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:17:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:17:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:51,508 INFO L225 Difference]: With dead ends: 52302 [2021-07-09 17:17:51,508 INFO L226 Difference]: Without dead ends: 52302 [2021-07-09 17:17:51,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:17:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-07-09 17:17:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-07-09 17:17:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-07-09 17:17:52,876 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-07-09 17:17:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:52,876 INFO L482 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-07-09 17:17:52,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:17:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-07-09 17:17:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:52,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:52,894 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:53,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:53,095 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:53,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-07-09 17:17:53,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:53,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052468926] [2021-07-09 17:17:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052468926] [2021-07-09 17:17:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052468926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394908128] [2021-07-09 17:17:53,152 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 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 17:17:53,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:17:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:53,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394908128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:53,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:53,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202644358] [2021-07-09 17:17:53,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:53,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:53,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:53,212 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:17:53,414 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 17:17:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:53,767 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-07-09 17:17:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:17:53,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 22 [2021-07-09 17:17:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:54,061 INFO L225 Difference]: With dead ends: 52382 [2021-07-09 17:17:54,061 INFO L226 Difference]: Without dead ends: 52376 [2021-07-09 17:17:54,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:17:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-07-09 17:17:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-07-09 17:17:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-07-09 17:17:55,189 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-07-09 17:17:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:55,189 INFO L482 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-07-09 17:17:55,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 17:17:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-07-09 17:17:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:55,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:55,207 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:55,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9905 [2021-07-09 17:17:55,408 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:55,408 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-07-09 17:17:55,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:55,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725630334] [2021-07-09 17:17:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:55,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725630334] [2021-07-09 17:17:55,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725630334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354276428] [2021-07-09 17:17:55,468 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 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 17:17:55,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:55,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:55,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354276428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:55,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:55,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:55,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139349574] [2021-07-09 17:17:55,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:55,699 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 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 17:17:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:56,110 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-07-09 17:17:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:17:56,110 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 22 [2021-07-09 17:17:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:56,475 INFO L225 Difference]: With dead ends: 71897 [2021-07-09 17:17:56,475 INFO L226 Difference]: Without dead ends: 71897 [2021-07-09 17:17:56,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-07-09 17:17:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-07-09 17:17:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-07-09 17:17:58,133 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-07-09 17:17:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:58,133 INFO L482 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-07-09 17:17:58,133 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 17:17:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-07-09 17:17:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:17:58,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:58,154 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:58,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9906,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:58,354 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-07-09 17:17:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786756756] [2021-07-09 17:17:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:58,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:58,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786756756] [2021-07-09 17:17:58,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786756756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698172921] [2021-07-09 17:17:58,412 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 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 17:17:58,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:17:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:17:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:58,635 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 17:17:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698172921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:58,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:58,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465380867] [2021-07-09 17:17:58,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:58,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:58,682 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 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 17:17:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:59,087 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-07-09 17:17:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:59,087 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 22 [2021-07-09 17:17:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:59,477 INFO L225 Difference]: With dead ends: 81568 [2021-07-09 17:17:59,477 INFO L226 Difference]: Without dead ends: 81568 [2021-07-09 17:17:59,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-07-09 17:18:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-07-09 17:18:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-07-09 17:18:01,273 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-07-09 17:18:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:01,273 INFO L482 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-07-09 17:18:01,273 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 17:18:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-07-09 17:18:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:01,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:01,294 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:01,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:01,495 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-07-09 17:18:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:01,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278979895] [2021-07-09 17:18:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:01,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278979895] [2021-07-09 17:18:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278979895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165803733] [2021-07-09 17:18:01,555 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 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 17:18:01,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:18:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:01,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:01,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165803733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:01,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:01,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:01,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312360458] [2021-07-09 17:18:01,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:01,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:01,616 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 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 17:18:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:02,385 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-07-09 17:18:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:02,386 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 22 [2021-07-09 17:18:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:02,888 INFO L225 Difference]: With dead ends: 104720 [2021-07-09 17:18:02,889 INFO L226 Difference]: Without dead ends: 104720 [2021-07-09 17:18:02,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-07-09 17:18:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-07-09 17:18:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-07-09 17:18:06,089 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-07-09 17:18:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:06,089 INFO L482 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-07-09 17:18:06,089 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 17:18:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-07-09 17:18:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:06,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:06,113 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:06,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9908 [2021-07-09 17:18:06,314 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-07-09 17:18:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:06,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511573770] [2021-07-09 17:18:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:06,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511573770] [2021-07-09 17:18:06,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511573770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601690686] [2021-07-09 17:18:06,379 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 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 17:18:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:06,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601690686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:06,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:06,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:06,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817131502] [2021-07-09 17:18:06,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:06,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:06,437 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 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 17:18:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:07,396 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-07-09 17:18:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:18:07,396 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 22 [2021-07-09 17:18:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:07,823 INFO L225 Difference]: With dead ends: 122524 [2021-07-09 17:18:07,823 INFO L226 Difference]: Without dead ends: 122524 [2021-07-09 17:18:07,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:18:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-07-09 17:18:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-07-09 17:18:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-07-09 17:18:11,291 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-07-09 17:18:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:11,291 INFO L482 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-07-09 17:18:11,291 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 17:18:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-07-09 17:18:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:11,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:11,319 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:11,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9909,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:11,519 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-07-09 17:18:11,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:11,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429323835] [2021-07-09 17:18:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:11,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429323835] [2021-07-09 17:18:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429323835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142304873] [2021-07-09 17:18:11,590 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 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 17:18:11,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142304873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:12,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:12,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969141862] [2021-07-09 17:18:12,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:12,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:12,006 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:13,127 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-07-09 17:18:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:18:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:13,688 INFO L225 Difference]: With dead ends: 149360 [2021-07-09 17:18:13,688 INFO L226 Difference]: Without dead ends: 149360 [2021-07-09 17:18:13,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:18:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-07-09 17:18:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-07-09 17:18:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-07-09 17:18:16,704 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-07-09 17:18:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:16,704 INFO L482 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-07-09 17:18:16,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-07-09 17:18:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:16,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:16,727 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9910,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:16,928 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-07-09 17:18:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:16,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782087255] [2021-07-09 17:18:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:17,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782087255] [2021-07-09 17:18:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782087255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246810805] [2021-07-09 17:18:17,000 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 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 17:18:17,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:18:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:17,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:17,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246810805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:17,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:17,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644064451] [2021-07-09 17:18:17,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:17,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:17,066 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:17,993 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-07-09 17:18:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:18:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:18,302 INFO L225 Difference]: With dead ends: 89497 [2021-07-09 17:18:18,302 INFO L226 Difference]: Without dead ends: 89497 [2021-07-09 17:18:18,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:18:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-07-09 17:18:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-07-09 17:18:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-07-09 17:18:19,991 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-07-09 17:18:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:19,991 INFO L482 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-07-09 17:18:19,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-07-09 17:18:20,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:20,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:20,004 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:20,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9911,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:20,205 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-07-09 17:18:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:20,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894256798] [2021-07-09 17:18:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:20,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:20,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894256798] [2021-07-09 17:18:20,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894256798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:20,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730049882] [2021-07-09 17:18:20,266 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 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 17:18:20,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730049882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:20,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:20,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72114530] [2021-07-09 17:18:20,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:20,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:20,332 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 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 17:18:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:20,800 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-07-09 17:18:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:18:20,813 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 22 [2021-07-09 17:18:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:20,904 INFO L225 Difference]: With dead ends: 46015 [2021-07-09 17:18:20,904 INFO L226 Difference]: Without dead ends: 46015 [2021-07-09 17:18:20,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-07-09 17:18:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-07-09 17:18:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-07-09 17:18:21,730 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-07-09 17:18:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:21,730 INFO L482 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-07-09 17:18:21,730 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 17:18:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-07-09 17:18:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:21,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:21,742 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:21,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9912,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:21,942 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-07-09 17:18:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:21,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266925887] [2021-07-09 17:18:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:22,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266925887] [2021-07-09 17:18:22,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266925887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290112168] [2021-07-09 17:18:22,000 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 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 17:18:22,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:18:22,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:22,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290112168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:22,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:22,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:22,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137825662] [2021-07-09 17:18:22,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:22,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:22,064 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 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 17:18:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:22,393 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-07-09 17:18:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:18:22,394 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 22 [2021-07-09 17:18:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:22,483 INFO L225 Difference]: With dead ends: 35745 [2021-07-09 17:18:22,484 INFO L226 Difference]: Without dead ends: 35745 [2021-07-09 17:18:22,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-07-09 17:18:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-07-09 17:18:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-07-09 17:18:23,281 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-07-09 17:18:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:23,281 INFO L482 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-07-09 17:18:23,281 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 17:18:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-07-09 17:18:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:23,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:23,293 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:23,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9913,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:23,494 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-07-09 17:18:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:23,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462362270] [2021-07-09 17:18:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:23,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:23,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462362270] [2021-07-09 17:18:23,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462362270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744557474] [2021-07-09 17:18:23,563 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 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 17:18:23,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:18:23,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744557474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:23,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690251552] [2021-07-09 17:18:23,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:23,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:23,637 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:24,019 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-07-09 17:18:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:24,107 INFO L225 Difference]: With dead ends: 36167 [2021-07-09 17:18:24,107 INFO L226 Difference]: Without dead ends: 36167 [2021-07-09 17:18:24,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-07-09 17:18:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-07-09 17:18:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-07-09 17:18:24,876 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-07-09 17:18:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:24,877 INFO L482 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-07-09 17:18:24,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-07-09 17:18:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:24,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:24,888 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:25,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9914,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:25,088 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-07-09 17:18:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231669054] [2021-07-09 17:18:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:25,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:25,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231669054] [2021-07-09 17:18:25,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231669054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634768839] [2021-07-09 17:18:25,157 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 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 17:18:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634768839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:25,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056370735] [2021-07-09 17:18:25,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:25,218 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:25,636 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-07-09 17:18:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:25,720 INFO L225 Difference]: With dead ends: 36419 [2021-07-09 17:18:25,720 INFO L226 Difference]: Without dead ends: 36419 [2021-07-09 17:18:25,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:18:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-07-09 17:18:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-07-09 17:18:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-07-09 17:18:26,478 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-07-09 17:18:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:26,478 INFO L482 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-07-09 17:18:26,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-07-09 17:18:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:26,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:26,490 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:26,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9915 [2021-07-09 17:18:26,690 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-07-09 17:18:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:26,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23428683] [2021-07-09 17:18:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:26,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:26,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23428683] [2021-07-09 17:18:26,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23428683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249527648] [2021-07-09 17:18:26,760 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 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 17:18:26,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:26,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:26,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:26,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:26,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249527648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:26,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:26,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249473297] [2021-07-09 17:18:26,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:26,821 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:27,342 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-07-09 17:18:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:18:27,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:27,431 INFO L225 Difference]: With dead ends: 36428 [2021-07-09 17:18:27,431 INFO L226 Difference]: Without dead ends: 36428 [2021-07-09 17:18:27,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:18:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-07-09 17:18:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-07-09 17:18:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-07-09 17:18:28,199 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-07-09 17:18:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:28,199 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-07-09 17:18:28,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-07-09 17:18:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:28,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:28,211 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:28,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9916,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:28,411 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-07-09 17:18:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:28,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840754605] [2021-07-09 17:18:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:28,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:28,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840754605] [2021-07-09 17:18:28,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840754605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544824485] [2021-07-09 17:18:28,456 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 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 17:18:28,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:18:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:28,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544824485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:28,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:18:28,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150893403] [2021-07-09 17:18:28,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:28,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:28,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:28,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:28,515 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 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 17:18:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:28,918 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-07-09 17:18:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:18:28,919 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 22 [2021-07-09 17:18:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:29,007 INFO L225 Difference]: With dead ends: 34348 [2021-07-09 17:18:29,007 INFO L226 Difference]: Without dead ends: 34344 [2021-07-09 17:18:29,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:18:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-07-09 17:18:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-07-09 17:18:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-07-09 17:18:29,802 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-07-09 17:18:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:29,802 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-07-09 17:18:29,802 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 17:18:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-07-09 17:18:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:29,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:29,815 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:30,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9917 [2021-07-09 17:18:30,015 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-07-09 17:18:30,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:30,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529038879] [2021-07-09 17:18:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:30,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529038879] [2021-07-09 17:18:30,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529038879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924708994] [2021-07-09 17:18:30,082 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 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 17:18:30,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:30,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:30,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:30,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924708994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:30,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:30,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528777513] [2021-07-09 17:18:30,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:30,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:30,148 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:30,599 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-07-09 17:18:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:18:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:30,689 INFO L225 Difference]: With dead ends: 37342 [2021-07-09 17:18:30,690 INFO L226 Difference]: Without dead ends: 37342 [2021-07-09 17:18:30,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:18:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-07-09 17:18:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-07-09 17:18:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-07-09 17:18:31,480 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-07-09 17:18:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:31,480 INFO L482 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-07-09 17:18:31,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-07-09 17:18:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:31,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:31,491 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:31,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-07-09 17:18:31,691 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-07-09 17:18:31,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:31,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719778902] [2021-07-09 17:18:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:31,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719778902] [2021-07-09 17:18:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719778902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265277200] [2021-07-09 17:18:31,757 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 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 17:18:31,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:31,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265277200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:31,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078939151] [2021-07-09 17:18:31,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:31,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:31,824 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:32,110 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-07-09 17:18:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:18:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:32,361 INFO L225 Difference]: With dead ends: 32697 [2021-07-09 17:18:32,361 INFO L226 Difference]: Without dead ends: 32697 [2021-07-09 17:18:32,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:18:32,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-07-09 17:18:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-07-09 17:18:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-07-09 17:18:33,060 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-07-09 17:18:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:33,060 INFO L482 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-07-09 17:18:33,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-07-09 17:18:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:33,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:33,070 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:33,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9919,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:33,272 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-07-09 17:18:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:33,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476226819] [2021-07-09 17:18:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476226819] [2021-07-09 17:18:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476226819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891607981] [2021-07-09 17:18:33,343 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 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 17:18:33,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891607981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:33,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912207163] [2021-07-09 17:18:33,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:33,418 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:33,814 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-07-09 17:18:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:18:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:33,888 INFO L225 Difference]: With dead ends: 33049 [2021-07-09 17:18:33,888 INFO L226 Difference]: Without dead ends: 33049 [2021-07-09 17:18:33,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:18:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-07-09 17:18:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-07-09 17:18:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-07-09 17:18:34,666 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-07-09 17:18:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:34,666 INFO L482 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-07-09 17:18:34,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-07-09 17:18:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:34,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:34,676 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:34,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-07-09 17:18:34,876 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-07-09 17:18:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785100688] [2021-07-09 17:18:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785100688] [2021-07-09 17:18:34,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785100688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548201925] [2021-07-09 17:18:34,925 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 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 17:18:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548201925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:34,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:18:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870131387] [2021-07-09 17:18:34,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:34,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:34,981 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 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 17:18:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:35,238 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-07-09 17:18:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:18:35,239 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 22 [2021-07-09 17:18:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:35,312 INFO L225 Difference]: With dead ends: 31092 [2021-07-09 17:18:35,312 INFO L226 Difference]: Without dead ends: 31088 [2021-07-09 17:18:35,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:18:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-07-09 17:18:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-07-09 17:18:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-07-09 17:18:36,152 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-07-09 17:18:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:36,152 INFO L482 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-07-09 17:18:36,152 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 17:18:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-07-09 17:18:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:36,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:36,161 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:36,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9921,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:36,361 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-07-09 17:18:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:36,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910975820] [2021-07-09 17:18:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:36,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910975820] [2021-07-09 17:18:36,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910975820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580445945] [2021-07-09 17:18:36,411 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 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 17:18:36,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:36,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580445945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:36,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:18:36,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724401139] [2021-07-09 17:18:36,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:36,471 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 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 17:18:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:36,661 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-07-09 17:18:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:36,662 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 22 [2021-07-09 17:18:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:36,731 INFO L225 Difference]: With dead ends: 31582 [2021-07-09 17:18:36,731 INFO L226 Difference]: Without dead ends: 31582 [2021-07-09 17:18:36,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-07-09 17:18:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-07-09 17:18:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-07-09 17:18:37,396 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-07-09 17:18:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:37,396 INFO L482 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-07-09 17:18:37,396 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 17:18:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-07-09 17:18:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:37,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:37,406 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:37,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:37,607 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-07-09 17:18:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:37,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21885299] [2021-07-09 17:18:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:37,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21885299] [2021-07-09 17:18:37,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21885299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645567095] [2021-07-09 17:18:37,658 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 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 17:18:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:18:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645567095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:37,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:18:37,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585753217] [2021-07-09 17:18:37,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:37,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:37,725 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 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 17:18:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:38,041 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-07-09 17:18:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:38,042 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 22 [2021-07-09 17:18:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:38,115 INFO L225 Difference]: With dead ends: 31896 [2021-07-09 17:18:38,115 INFO L226 Difference]: Without dead ends: 31896 [2021-07-09 17:18:38,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-07-09 17:18:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-07-09 17:18:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-07-09 17:18:38,783 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-07-09 17:18:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:38,783 INFO L482 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-07-09 17:18:38,783 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 17:18:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-07-09 17:18:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:38,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:38,793 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:38,993 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-07-09 17:18:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551618613] [2021-07-09 17:18:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:39,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551618613] [2021-07-09 17:18:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551618613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895298001] [2021-07-09 17:18:39,052 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 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 17:18:39,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:39,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:39,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895298001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:18:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321822995] [2021-07-09 17:18:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:39,117 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:39,350 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-07-09 17:18:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:39,576 INFO L225 Difference]: With dead ends: 31958 [2021-07-09 17:18:39,577 INFO L226 Difference]: Without dead ends: 31958 [2021-07-09 17:18:39,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-07-09 17:18:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-07-09 17:18:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-07-09 17:18:40,236 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-07-09 17:18:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:40,237 INFO L482 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-07-09 17:18:40,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-07-09 17:18:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:40,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:40,247 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:40,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9924,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:40,447 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-07-09 17:18:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:40,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144710743] [2021-07-09 17:18:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144710743] [2021-07-09 17:18:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144710743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541187378] [2021-07-09 17:18:40,505 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 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 17:18:40,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:18:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541187378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:40,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:18:40,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132621101] [2021-07-09 17:18:40,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:40,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:40,572 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:40,813 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-07-09 17:18:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:40,902 INFO L225 Difference]: With dead ends: 36047 [2021-07-09 17:18:40,902 INFO L226 Difference]: Without dead ends: 36047 [2021-07-09 17:18:40,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:18:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-07-09 17:18:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-07-09 17:18:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-07-09 17:18:41,771 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-07-09 17:18:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:41,771 INFO L482 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-07-09 17:18:41,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-07-09 17:18:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:41,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:41,782 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:41,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9925 [2021-07-09 17:18:41,982 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-07-09 17:18:41,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:41,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259713972] [2021-07-09 17:18:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:42,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259713972] [2021-07-09 17:18:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259713972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779484235] [2021-07-09 17:18:42,042 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 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 17:18:42,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:42,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779484235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:42,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:18:42,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078358221] [2021-07-09 17:18:42,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:42,111 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:42,346 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-07-09 17:18:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:42,441 INFO L225 Difference]: With dead ends: 39264 [2021-07-09 17:18:42,441 INFO L226 Difference]: Without dead ends: 39264 [2021-07-09 17:18:42,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-07-09 17:18:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-07-09 17:18:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-07-09 17:18:43,381 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-07-09 17:18:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:43,381 INFO L482 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-07-09 17:18:43,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-07-09 17:18:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:43,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:43,394 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:43,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9926,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:43,594 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-07-09 17:18:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:43,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072478974] [2021-07-09 17:18:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:43,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072478974] [2021-07-09 17:18:43,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072478974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569884022] [2021-07-09 17:18:43,660 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 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 17:18:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569884022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:43,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719037736] [2021-07-09 17:18:43,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:43,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:43,726 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:44,009 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-07-09 17:18:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:44,101 INFO L225 Difference]: With dead ends: 39365 [2021-07-09 17:18:44,101 INFO L226 Difference]: Without dead ends: 39365 [2021-07-09 17:18:44,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:18:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-07-09 17:18:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-07-09 17:18:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-07-09 17:18:45,001 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-07-09 17:18:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:45,002 INFO L482 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-07-09 17:18:45,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-07-09 17:18:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:45,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:45,015 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:45,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9927 [2021-07-09 17:18:45,216 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-07-09 17:18:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:45,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059708832] [2021-07-09 17:18:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:45,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:45,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059708832] [2021-07-09 17:18:45,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059708832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557141204] [2021-07-09 17:18:45,288 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 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 17:18:45,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:45,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:45,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557141204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:45,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:45,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450648774] [2021-07-09 17:18:45,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:45,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:45,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:45,354 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:45,856 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-07-09 17:18:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:18:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:45,954 INFO L225 Difference]: With dead ends: 40630 [2021-07-09 17:18:45,955 INFO L226 Difference]: Without dead ends: 40630 [2021-07-09 17:18:45,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:18:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-07-09 17:18:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-07-09 17:18:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-07-09 17:18:46,827 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-07-09 17:18:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:46,827 INFO L482 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-07-09 17:18:46,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-07-09 17:18:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:46,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:46,840 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:47,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9928,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:47,041 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-07-09 17:18:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498964602] [2021-07-09 17:18:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:47,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498964602] [2021-07-09 17:18:47,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498964602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74979438] [2021-07-09 17:18:47,116 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 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 17:18:47,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:18:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74979438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:47,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:18:47,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375135182] [2021-07-09 17:18:47,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:47,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:47,185 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:47,808 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-07-09 17:18:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:18:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:18:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:47,924 INFO L225 Difference]: With dead ends: 42248 [2021-07-09 17:18:47,924 INFO L226 Difference]: Without dead ends: 42248 [2021-07-09 17:18:47,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:18:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-07-09 17:18:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-07-09 17:18:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-07-09 17:18:49,001 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-07-09 17:18:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:49,001 INFO L482 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-07-09 17:18:49,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:18:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-07-09 17:18:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:49,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:49,015 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:49,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9929,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:49,216 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-07-09 17:18:49,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:49,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708623666] [2021-07-09 17:18:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:49,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708623666] [2021-07-09 17:18:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708623666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856299162] [2021-07-09 17:18:49,274 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 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 17:18:49,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:49,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856299162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:49,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459623073] [2021-07-09 17:18:49,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:49,330 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 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 17:18:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:49,697 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-07-09 17:18:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:18:49,697 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 22 [2021-07-09 17:18:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:49,799 INFO L225 Difference]: With dead ends: 41740 [2021-07-09 17:18:49,799 INFO L226 Difference]: Without dead ends: 41734 [2021-07-09 17:18:49,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:18:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-07-09 17:18:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-07-09 17:18:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-07-09 17:18:50,799 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-07-09 17:18:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:50,799 INFO L482 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-07-09 17:18:50,799 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 17:18:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-07-09 17:18:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:50,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:50,812 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:51,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9930 [2021-07-09 17:18:51,013 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-07-09 17:18:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:51,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966230254] [2021-07-09 17:18:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:51,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:51,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966230254] [2021-07-09 17:18:51,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966230254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547884014] [2021-07-09 17:18:51,070 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 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 17:18:51,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:18:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547884014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:51,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462480562] [2021-07-09 17:18:51,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:51,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:51,131 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 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 17:18:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:51,379 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-07-09 17:18:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:18:51,379 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 22 [2021-07-09 17:18:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:51,689 INFO L225 Difference]: With dead ends: 46670 [2021-07-09 17:18:51,689 INFO L226 Difference]: Without dead ends: 46670 [2021-07-09 17:18:51,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-07-09 17:18:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-07-09 17:18:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-07-09 17:18:52,646 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-07-09 17:18:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:52,646 INFO L482 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-07-09 17:18:52,646 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 17:18:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-07-09 17:18:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:52,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:52,663 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:52,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9931,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:52,863 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-07-09 17:18:52,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:52,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812061394] [2021-07-09 17:18:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:52,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812061394] [2021-07-09 17:18:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812061394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997798930] [2021-07-09 17:18:52,927 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 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 17:18:52,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:18:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997798930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:52,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:52,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005959699] [2021-07-09 17:18:52,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:52,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:52,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:52,987 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:53,147 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 17:18:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:53,429 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-07-09 17:18:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:53,560 INFO L225 Difference]: With dead ends: 49343 [2021-07-09 17:18:53,561 INFO L226 Difference]: Without dead ends: 49343 [2021-07-09 17:18:53,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-07-09 17:18:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-07-09 17:18:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-07-09 17:18:54,729 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-07-09 17:18:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:54,729 INFO L482 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-07-09 17:18:54,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-07-09 17:18:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:54,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:54,746 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:54,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9932 [2021-07-09 17:18:54,946 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:54,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-07-09 17:18:54,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:54,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444702321] [2021-07-09 17:18:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:55,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:55,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444702321] [2021-07-09 17:18:55,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444702321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:55,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253182807] [2021-07-09 17:18:55,013 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 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 17:18:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:55,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:55,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253182807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:55,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:55,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190350759] [2021-07-09 17:18:55,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:55,072 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:55,642 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-07-09 17:18:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:55,783 INFO L225 Difference]: With dead ends: 55150 [2021-07-09 17:18:55,783 INFO L226 Difference]: Without dead ends: 55150 [2021-07-09 17:18:55,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:18:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-07-09 17:18:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-07-09 17:18:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-07-09 17:18:57,065 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-07-09 17:18:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:57,065 INFO L482 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-07-09 17:18:57,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-07-09 17:18:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:57,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:57,083 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:57,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9933,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:57,284 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:57,284 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-07-09 17:18:57,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:57,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985614216] [2021-07-09 17:18:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:57,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:57,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985614216] [2021-07-09 17:18:57,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985614216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:57,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631168815] [2021-07-09 17:18:57,353 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 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 17:18:57,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:57,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631168815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:57,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:57,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779740838] [2021-07-09 17:18:57,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:57,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:57,414 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:58,136 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-07-09 17:18:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:18:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:18:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:58,313 INFO L225 Difference]: With dead ends: 68037 [2021-07-09 17:18:58,313 INFO L226 Difference]: Without dead ends: 68037 [2021-07-09 17:18:58,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:18:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-07-09 17:18:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-07-09 17:18:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-07-09 17:18:59,828 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-07-09 17:18:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-07-09 17:18:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:18:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-07-09 17:18:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:18:59,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:59,849 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:00,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9934,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:00,050 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-07-09 17:19:00,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:00,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336968108] [2021-07-09 17:19:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:00,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336968108] [2021-07-09 17:19:00,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336968108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124886225] [2021-07-09 17:19:00,122 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 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 17:19:00,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:19:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:00,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124886225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:00,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:00,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579581737] [2021-07-09 17:19:00,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:00,198 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:00,584 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:19:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:00,936 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-07-09 17:19:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:19:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:01,160 INFO L225 Difference]: With dead ends: 75602 [2021-07-09 17:19:01,160 INFO L226 Difference]: Without dead ends: 75602 [2021-07-09 17:19:01,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:19:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-07-09 17:19:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-07-09 17:19:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-07-09 17:19:02,991 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-07-09 17:19:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:02,991 INFO L482 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-07-09 17:19:02,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-07-09 17:19:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:03,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:03,008 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9935,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:03,208 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-07-09 17:19:03,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:03,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207037463] [2021-07-09 17:19:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:03,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:03,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207037463] [2021-07-09 17:19:03,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207037463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:03,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658503615] [2021-07-09 17:19:03,282 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 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 17:19:03,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:03,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658503615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:03,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:03,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:03,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062186143] [2021-07-09 17:19:03,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:03,367 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:03,932 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-07-09 17:19:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:19:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:04,326 INFO L225 Difference]: With dead ends: 68985 [2021-07-09 17:19:04,327 INFO L226 Difference]: Without dead ends: 68985 [2021-07-09 17:19:04,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:19:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-07-09 17:19:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-07-09 17:19:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-07-09 17:19:05,685 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-07-09 17:19:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:05,685 INFO L482 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-07-09 17:19:05,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-07-09 17:19:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:05,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:05,701 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:05,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:05,901 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-07-09 17:19:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:05,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083422809] [2021-07-09 17:19:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:05,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:05,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083422809] [2021-07-09 17:19:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083422809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:05,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721414912] [2021-07-09 17:19:05,965 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 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 17:19:05,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:19:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:06,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721414912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:06,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:06,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:19:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712927960] [2021-07-09 17:19:06,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:06,041 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:06,367 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-07-09 17:19:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:19:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:19:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:06,505 INFO L225 Difference]: With dead ends: 49438 [2021-07-09 17:19:06,506 INFO L226 Difference]: Without dead ends: 49438 [2021-07-09 17:19:06,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:19:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-07-09 17:19:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-07-09 17:19:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-07-09 17:19:07,591 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-07-09 17:19:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:07,591 INFO L482 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-07-09 17:19:07,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-07-09 17:19:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:07,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:07,602 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:07,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-07-09 17:19:07,803 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-07-09 17:19:07,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:07,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596614449] [2021-07-09 17:19:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:07,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596614449] [2021-07-09 17:19:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596614449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378006429] [2021-07-09 17:19:07,861 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 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 17:19:07,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:19:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:07,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378006429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:07,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:07,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:19:07,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84741667] [2021-07-09 17:19:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:07,932 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:08,158 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-07-09 17:19:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:19:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:19:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:08,249 INFO L225 Difference]: With dead ends: 38526 [2021-07-09 17:19:08,249 INFO L226 Difference]: Without dead ends: 38526 [2021-07-09 17:19:08,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-07-09 17:19:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-07-09 17:19:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-07-09 17:19:09,184 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-07-09 17:19:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:09,184 INFO L482 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-07-09 17:19:09,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-07-09 17:19:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:09,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:09,196 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:09,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9938,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:09,397 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-07-09 17:19:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951493302] [2021-07-09 17:19:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:09,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:09,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951493302] [2021-07-09 17:19:09,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951493302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:09,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144567151] [2021-07-09 17:19:09,464 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 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 17:19:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144567151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:09,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:09,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291770453] [2021-07-09 17:19:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:09,529 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:09,813 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-07-09 17:19:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:19:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:09,902 INFO L225 Difference]: With dead ends: 38877 [2021-07-09 17:19:09,903 INFO L226 Difference]: Without dead ends: 38877 [2021-07-09 17:19:09,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:19:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-07-09 17:19:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-07-09 17:19:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-07-09 17:19:10,844 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-07-09 17:19:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:10,844 INFO L482 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-07-09 17:19:10,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-07-09 17:19:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:10,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:10,856 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:11,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9939 [2021-07-09 17:19:11,057 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-07-09 17:19:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:11,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963761589] [2021-07-09 17:19:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:11,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:11,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963761589] [2021-07-09 17:19:11,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963761589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:11,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181250813] [2021-07-09 17:19:11,128 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 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 17:19:11,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:11,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181250813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:11,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:11,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:11,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865931809] [2021-07-09 17:19:11,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:11,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:11,194 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:11,548 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-07-09 17:19:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:19:11,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:11,799 INFO L225 Difference]: With dead ends: 39004 [2021-07-09 17:19:11,800 INFO L226 Difference]: Without dead ends: 39004 [2021-07-09 17:19:11,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:19:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-07-09 17:19:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-07-09 17:19:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-07-09 17:19:12,553 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-07-09 17:19:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:12,553 INFO L482 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-07-09 17:19:12,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-07-09 17:19:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:12,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:12,565 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:12,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-07-09 17:19:12,766 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-07-09 17:19:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:12,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84799307] [2021-07-09 17:19:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:12,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:12,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84799307] [2021-07-09 17:19:12,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84799307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:12,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826439944] [2021-07-09 17:19:12,837 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 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 17:19:12,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:19:12,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:12,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:12,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826439944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:12,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:12,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797228140] [2021-07-09 17:19:12,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:12,920 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:13,487 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-07-09 17:19:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:19:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:13,578 INFO L225 Difference]: With dead ends: 39220 [2021-07-09 17:19:13,578 INFO L226 Difference]: Without dead ends: 39220 [2021-07-09 17:19:13,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:19:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-07-09 17:19:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-07-09 17:19:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-07-09 17:19:14,361 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-07-09 17:19:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:14,361 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-07-09 17:19:14,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-07-09 17:19:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:14,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:14,373 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:14,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9941 [2021-07-09 17:19:14,574 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-07-09 17:19:14,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:14,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455534614] [2021-07-09 17:19:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455534614] [2021-07-09 17:19:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455534614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972873053] [2021-07-09 17:19:14,622 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 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 17:19:14,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:14,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972873053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:14,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:14,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:19:14,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992990547] [2021-07-09 17:19:14,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:19:14,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:19:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:19:14,677 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 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 17:19:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:15,087 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-07-09 17:19:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:19:15,087 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 22 [2021-07-09 17:19:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:15,161 INFO L225 Difference]: With dead ends: 37627 [2021-07-09 17:19:15,161 INFO L226 Difference]: Without dead ends: 37623 [2021-07-09 17:19:15,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:19:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-07-09 17:19:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-07-09 17:19:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-07-09 17:19:15,896 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-07-09 17:19:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:15,896 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-07-09 17:19:15,896 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 17:19:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-07-09 17:19:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:15,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:15,907 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-07-09 17:19:16,108 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-07-09 17:19:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:16,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926374719] [2021-07-09 17:19:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:16,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:16,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926374719] [2021-07-09 17:19:16,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926374719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:16,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757633789] [2021-07-09 17:19:16,176 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 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 17:19:16,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:19:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:16,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757633789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:16,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:16,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180117663] [2021-07-09 17:19:16,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:16,243 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:16,747 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-07-09 17:19:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:19:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:16,839 INFO L225 Difference]: With dead ends: 44126 [2021-07-09 17:19:16,839 INFO L226 Difference]: Without dead ends: 44126 [2021-07-09 17:19:16,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:19:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-07-09 17:19:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-07-09 17:19:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-07-09 17:19:17,825 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-07-09 17:19:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:17,825 INFO L482 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-07-09 17:19:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-07-09 17:19:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:17,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:17,841 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:18,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9943,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:18,045 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-07-09 17:19:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:18,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823127517] [2021-07-09 17:19:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:18,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823127517] [2021-07-09 17:19:18,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823127517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636522812] [2021-07-09 17:19:18,116 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 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 17:19:18,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:19:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636522812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389220613] [2021-07-09 17:19:18,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:18,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:18,182 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:18,554 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-07-09 17:19:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:19:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:18,826 INFO L225 Difference]: With dead ends: 46244 [2021-07-09 17:19:18,826 INFO L226 Difference]: Without dead ends: 46244 [2021-07-09 17:19:18,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:19:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-07-09 17:19:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-07-09 17:19:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-07-09 17:19:19,796 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-07-09 17:19:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-07-09 17:19:19,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-07-09 17:19:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:19,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:19,814 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:20,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9944,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:20,014 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-07-09 17:19:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:20,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820554774] [2021-07-09 17:19:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:20,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:20,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820554774] [2021-07-09 17:19:20,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820554774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:20,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673197361] [2021-07-09 17:19:20,095 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 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 17:19:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673197361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:20,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:20,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:20,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553619904] [2021-07-09 17:19:20,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:20,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:20,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:20,160 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:20,730 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-07-09 17:19:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:19:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:20,833 INFO L225 Difference]: With dead ends: 47891 [2021-07-09 17:19:20,833 INFO L226 Difference]: Without dead ends: 47891 [2021-07-09 17:19:20,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:19:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-07-09 17:19:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-07-09 17:19:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-07-09 17:19:21,847 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-07-09 17:19:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:21,847 INFO L482 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-07-09 17:19:21,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-07-09 17:19:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:21,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:21,865 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:22,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:22,066 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-07-09 17:19:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:22,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794334332] [2021-07-09 17:19:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:22,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794334332] [2021-07-09 17:19:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794334332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158761159] [2021-07-09 17:19:22,116 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 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 17:19:22,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:22,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:22,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:22,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158761159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:22,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:22,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:19:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577856599] [2021-07-09 17:19:22,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:19:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:19:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:19:22,174 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 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 17:19:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:22,684 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-07-09 17:19:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:19:22,684 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 22 [2021-07-09 17:19:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:22,778 INFO L225 Difference]: With dead ends: 47040 [2021-07-09 17:19:22,778 INFO L226 Difference]: Without dead ends: 47036 [2021-07-09 17:19:22,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:19:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-07-09 17:19:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-07-09 17:19:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-07-09 17:19:23,721 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-07-09 17:19:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:23,721 INFO L482 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-07-09 17:19:23,721 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 17:19:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-07-09 17:19:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:23,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:23,878 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:24,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:24,079 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-07-09 17:19:24,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:24,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729968881] [2021-07-09 17:19:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:24,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:24,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729968881] [2021-07-09 17:19:24,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729968881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:24,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327951356] [2021-07-09 17:19:24,129 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 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 17:19:24,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:19:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:24,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327951356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:24,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:24,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:19:24,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711833113] [2021-07-09 17:19:24,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:19:24,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:19:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:19:24,190 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 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 17:19:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:24,448 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-07-09 17:19:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:19:24,448 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 22 [2021-07-09 17:19:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:24,552 INFO L225 Difference]: With dead ends: 47717 [2021-07-09 17:19:24,552 INFO L226 Difference]: Without dead ends: 47717 [2021-07-09 17:19:24,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:19:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-07-09 17:19:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-07-09 17:19:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-07-09 17:19:25,598 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-07-09 17:19:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:25,598 INFO L482 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-07-09 17:19:25,598 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 17:19:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-07-09 17:19:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:25,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:25,616 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:25,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9947,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:25,816 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-07-09 17:19:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:25,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669837382] [2021-07-09 17:19:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:25,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:25,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669837382] [2021-07-09 17:19:25,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669837382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:25,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202379821] [2021-07-09 17:19:25,866 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 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 17:19:25,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:25,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202379821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:25,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:25,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:19:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094015352] [2021-07-09 17:19:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:19:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:19:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:19:25,930 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 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 17:19:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:26,403 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-07-09 17:19:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:19:26,403 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 22 [2021-07-09 17:19:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:26,501 INFO L225 Difference]: With dead ends: 48348 [2021-07-09 17:19:26,501 INFO L226 Difference]: Without dead ends: 48348 [2021-07-09 17:19:26,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:19:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-07-09 17:19:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-07-09 17:19:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-07-09 17:19:27,429 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-07-09 17:19:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:27,429 INFO L482 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-07-09 17:19:27,429 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 17:19:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-07-09 17:19:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:27,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:27,587 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:27,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9948 [2021-07-09 17:19:27,788 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-07-09 17:19:27,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:27,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060827879] [2021-07-09 17:19:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:27,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:27,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060827879] [2021-07-09 17:19:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060827879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:27,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169972689] [2021-07-09 17:19:27,840 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 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 17:19:27,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:19:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169972689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:27,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:27,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:19:27,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114247176] [2021-07-09 17:19:27,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:19:27,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:19:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:19:27,904 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 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 17:19:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:28,267 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-07-09 17:19:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:19:28,267 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 22 [2021-07-09 17:19:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:28,421 INFO L225 Difference]: With dead ends: 64639 [2021-07-09 17:19:28,421 INFO L226 Difference]: Without dead ends: 64639 [2021-07-09 17:19:28,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:19:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-07-09 17:19:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-07-09 17:19:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-07-09 17:19:29,967 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-07-09 17:19:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:29,967 INFO L482 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-07-09 17:19:29,967 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 17:19:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-07-09 17:19:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:29,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:29,987 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:30,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9949,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:30,188 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-07-09 17:19:30,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:30,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619246465] [2021-07-09 17:19:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:30,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619246465] [2021-07-09 17:19:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619246465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714739054] [2021-07-09 17:19:30,245 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 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 17:19:30,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:19:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714739054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:30,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:19:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886496162] [2021-07-09 17:19:30,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:30,311 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:30,696 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-07-09 17:19:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:19:30,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:19:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:31,054 INFO L225 Difference]: With dead ends: 64066 [2021-07-09 17:19:31,055 INFO L226 Difference]: Without dead ends: 64066 [2021-07-09 17:19:31,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:19:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-07-09 17:19:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-07-09 17:19:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-07-09 17:19:32,388 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-07-09 17:19:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-07-09 17:19:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-07-09 17:19:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:32,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:32,409 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:32,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9950 [2021-07-09 17:19:32,610 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-07-09 17:19:32,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:32,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909534225] [2021-07-09 17:19:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:32,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:32,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909534225] [2021-07-09 17:19:32,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909534225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:32,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443389503] [2021-07-09 17:19:32,669 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 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 17:19:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:32,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443389503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:32,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:32,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:19:32,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124028810] [2021-07-09 17:19:32,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:32,732 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:33,323 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-07-09 17:19:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:19:33,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:19:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:33,512 INFO L225 Difference]: With dead ends: 73057 [2021-07-09 17:19:33,513 INFO L226 Difference]: Without dead ends: 73057 [2021-07-09 17:19:33,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:19:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-07-09 17:19:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-07-09 17:19:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-07-09 17:19:35,315 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-07-09 17:19:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:35,315 INFO L482 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-07-09 17:19:35,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-07-09 17:19:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:35,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:35,339 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:35,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-07-09 17:19:35,539 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-07-09 17:19:35,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:35,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342577929] [2021-07-09 17:19:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:35,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:35,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342577929] [2021-07-09 17:19:35,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342577929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:35,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206814147] [2021-07-09 17:19:35,602 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 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 17:19:35,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:35,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206814147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:35,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:35,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:19:35,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323215559] [2021-07-09 17:19:35,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:35,665 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:36,285 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-07-09 17:19:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:19:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-07-09 17:19:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:36,483 INFO L225 Difference]: With dead ends: 76219 [2021-07-09 17:19:36,483 INFO L226 Difference]: Without dead ends: 76219 [2021-07-09 17:19:36,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:19:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-07-09 17:19:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-07-09 17:19:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-07-09 17:19:38,422 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-07-09 17:19:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:38,422 INFO L482 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-07-09 17:19:38,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 17:19:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-07-09 17:19:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:38,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:38,449 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:38,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-07-09 17:19:38,649 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-07-09 17:19:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:38,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155641100] [2021-07-09 17:19:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:38,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:38,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155641100] [2021-07-09 17:19:38,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155641100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:38,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262237841] [2021-07-09 17:19:38,720 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 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 17:19:38,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:19:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262237841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:38,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:38,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:38,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124987503] [2021-07-09 17:19:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:38,787 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:39,526 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-07-09 17:19:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:19:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:39,766 INFO L225 Difference]: With dead ends: 76769 [2021-07-09 17:19:39,766 INFO L226 Difference]: Without dead ends: 76769 [2021-07-09 17:19:39,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:19:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-07-09 17:19:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-07-09 17:19:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-07-09 17:19:41,736 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-07-09 17:19:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:41,736 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-07-09 17:19:41,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-07-09 17:19:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:41,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:41,762 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:41,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-07-09 17:19:41,963 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-07-09 17:19:41,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:41,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248013817] [2021-07-09 17:19:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:42,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248013817] [2021-07-09 17:19:42,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248013817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848938316] [2021-07-09 17:19:42,036 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 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 17:19:42,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:42,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:42,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848938316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:42,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:42,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:42,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217184498] [2021-07-09 17:19:42,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:42,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:42,104 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:42,886 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-07-09 17:19:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:19:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:43,118 INFO L225 Difference]: With dead ends: 77589 [2021-07-09 17:19:43,119 INFO L226 Difference]: Without dead ends: 77589 [2021-07-09 17:19:43,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:19:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-07-09 17:19:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-07-09 17:19:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-07-09 17:19:45,121 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-07-09 17:19:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:45,121 INFO L482 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-07-09 17:19:45,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-07-09 17:19:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:45,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:45,149 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:45,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:45,349 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-07-09 17:19:45,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:45,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715146381] [2021-07-09 17:19:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:45,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715146381] [2021-07-09 17:19:45,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715146381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067255940] [2021-07-09 17:19:45,428 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 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 17:19:45,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:19:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:45,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067255940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:45,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:45,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:19:45,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324793061] [2021-07-09 17:19:45,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:45,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:45,496 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:46,349 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-07-09 17:19:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:19:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-09 17:19:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:46,589 INFO L225 Difference]: With dead ends: 78959 [2021-07-09 17:19:46,589 INFO L226 Difference]: Without dead ends: 78959 [2021-07-09 17:19:46,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:19:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-07-09 17:19:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-07-09 17:19:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-07-09 17:19:48,568 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-07-09 17:19:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:48,569 INFO L482 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-07-09 17:19:48,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 17:19:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-07-09 17:19:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:48,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:48,596 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:48,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9955,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:48,797 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-07-09 17:19:48,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:48,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433760018] [2021-07-09 17:19:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:48,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433760018] [2021-07-09 17:19:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433760018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190455550] [2021-07-09 17:19:48,881 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 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 17:19:48,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:19:48,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:48,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190455550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:48,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:48,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-09 17:19:48,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784668990] [2021-07-09 17:19:48,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:48,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:48,943 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 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 17:19:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:49,754 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-07-09 17:19:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:19:49,755 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 22 [2021-07-09 17:19:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:49,982 INFO L225 Difference]: With dead ends: 77569 [2021-07-09 17:19:49,983 INFO L226 Difference]: Without dead ends: 77563 [2021-07-09 17:19:49,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:19:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-07-09 17:19:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-07-09 17:19:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-07-09 17:19:51,950 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-07-09 17:19:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:51,950 INFO L482 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-07-09 17:19:51,950 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 17:19:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-07-09 17:19:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:51,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:51,978 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:52,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9956,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:52,193 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-07-09 17:19:52,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:52,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510629706] [2021-07-09 17:19:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:52,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:52,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510629706] [2021-07-09 17:19:52,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510629706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:52,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130398194] [2021-07-09 17:19:52,519 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 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 17:19:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:52,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130398194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:52,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:52,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 17:19:52,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458949472] [2021-07-09 17:19:52,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:52,595 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 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 17:19:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:53,272 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-07-09 17:19:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:19:53,273 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 22 [2021-07-09 17:19:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:53,844 INFO L225 Difference]: With dead ends: 105545 [2021-07-09 17:19:53,844 INFO L226 Difference]: Without dead ends: 105545 [2021-07-09 17:19:53,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:19:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-07-09 17:19:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-07-09 17:19:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-07-09 17:19:56,640 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-07-09 17:19:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:56,640 INFO L482 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-07-09 17:19:56,640 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 17:19:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-07-09 17:19:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:19:56,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:56,673 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:56,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:56,874 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-07-09 17:19:56,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:56,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006195595] [2021-07-09 17:19:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:56,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:56,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006195595] [2021-07-09 17:19:56,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006195595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:56,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697301277] [2021-07-09 17:19:56,950 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 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 17:19:56,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:19:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697301277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:57,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:57,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:19:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510496395] [2021-07-09 17:19:57,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:19:57,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:57,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:19:57,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:19:57,023 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:19:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:58,020 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-07-09 17:19:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:19:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:19:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:58,422 INFO L225 Difference]: With dead ends: 114469 [2021-07-09 17:19:58,422 INFO L226 Difference]: Without dead ends: 114469 [2021-07-09 17:19:58,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:19:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-07-09 17:20:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-07-09 17:20:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-07-09 17:20:01,347 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-07-09 17:20:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:01,347 INFO L482 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-07-09 17:20:01,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-07-09 17:20:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:01,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:01,378 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:01,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9958 [2021-07-09 17:20:01,579 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-07-09 17:20:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459720997] [2021-07-09 17:20:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:01,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:01,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459720997] [2021-07-09 17:20:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459720997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482444149] [2021-07-09 17:20:01,671 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 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 17:20:01,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:20:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482444149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269463650] [2021-07-09 17:20:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:01,748 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:02,836 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-07-09 17:20:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:20:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:03,192 INFO L225 Difference]: With dead ends: 104983 [2021-07-09 17:20:03,192 INFO L226 Difference]: Without dead ends: 104983 [2021-07-09 17:20:03,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:20:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-07-09 17:20:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-07-09 17:20:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-07-09 17:20:05,909 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-07-09 17:20:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:05,909 INFO L482 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-07-09 17:20:05,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-07-09 17:20:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:05,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:05,944 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:06,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9959,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:06,144 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-07-09 17:20:06,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:06,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68389507] [2021-07-09 17:20:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:06,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68389507] [2021-07-09 17:20:06,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68389507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364588457] [2021-07-09 17:20:06,228 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 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 17:20:06,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:20:06,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364588457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:06,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:06,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:06,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901455368] [2021-07-09 17:20:06,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:06,582 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:07,717 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-07-09 17:20:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:20:07,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:08,068 INFO L225 Difference]: With dead ends: 104672 [2021-07-09 17:20:08,069 INFO L226 Difference]: Without dead ends: 104672 [2021-07-09 17:20:08,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:20:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-07-09 17:20:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-07-09 17:20:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-07-09 17:20:10,707 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-07-09 17:20:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:10,707 INFO L482 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-07-09 17:20:10,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-07-09 17:20:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:10,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:10,741 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:10,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9960 [2021-07-09 17:20:10,955 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-07-09 17:20:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:10,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145993557] [2021-07-09 17:20:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:11,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145993557] [2021-07-09 17:20:11,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145993557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756133507] [2021-07-09 17:20:11,031 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 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 17:20:11,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:20:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:11,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756133507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:11,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:11,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94052915] [2021-07-09 17:20:11,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:11,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:11,106 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:12,101 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-07-09 17:20:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:20:12,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:12,481 INFO L225 Difference]: With dead ends: 105621 [2021-07-09 17:20:12,481 INFO L226 Difference]: Without dead ends: 105621 [2021-07-09 17:20:12,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:20:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-07-09 17:20:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-07-09 17:20:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-07-09 17:20:15,213 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-07-09 17:20:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:15,213 INFO L482 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-07-09 17:20:15,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-07-09 17:20:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:15,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:15,246 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:15,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9961 [2021-07-09 17:20:15,449 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-07-09 17:20:15,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:15,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195654171] [2021-07-09 17:20:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:15,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195654171] [2021-07-09 17:20:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195654171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160210745] [2021-07-09 17:20:15,532 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 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 17:20:15,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:20:15,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:15,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160210745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:15,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:15,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:15,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9808867] [2021-07-09 17:20:15,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:15,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:15,610 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:16,732 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-07-09 17:20:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:20:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:17,041 INFO L225 Difference]: With dead ends: 96355 [2021-07-09 17:20:17,042 INFO L226 Difference]: Without dead ends: 96355 [2021-07-09 17:20:17,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:20:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-07-09 17:20:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-07-09 17:20:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-07-09 17:20:19,725 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-07-09 17:20:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:19,725 INFO L482 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-07-09 17:20:19,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-07-09 17:20:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:19,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:19,763 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:19,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9962,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:19,969 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-07-09 17:20:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:19,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292266] [2021-07-09 17:20:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:20,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292266] [2021-07-09 17:20:20,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319612826] [2021-07-09 17:20:20,037 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 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 17:20:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319612826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:20,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:20,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 17:20:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560678961] [2021-07-09 17:20:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:20:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:20:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:20,111 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 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 17:20:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:21,026 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-07-09 17:20:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:20:21,026 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 22 [2021-07-09 17:20:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:21,306 INFO L225 Difference]: With dead ends: 91563 [2021-07-09 17:20:21,306 INFO L226 Difference]: Without dead ends: 91563 [2021-07-09 17:20:21,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:20:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-07-09 17:20:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-07-09 17:20:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-07-09 17:20:23,865 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-07-09 17:20:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:23,865 INFO L482 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-07-09 17:20:23,866 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 17:20:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-07-09 17:20:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:23,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:23,929 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:24,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9963 [2021-07-09 17:20:24,150 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-07-09 17:20:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:24,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807312724] [2021-07-09 17:20:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:24,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:24,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807312724] [2021-07-09 17:20:24,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807312724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:24,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922855464] [2021-07-09 17:20:24,220 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 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 17:20:24,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:20:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922855464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:24,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:24,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 17:20:24,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521768986] [2021-07-09 17:20:24,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:20:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:20:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:24,299 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 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 17:20:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:24,890 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-07-09 17:20:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:20:24,891 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 22 [2021-07-09 17:20:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:25,413 INFO L225 Difference]: With dead ends: 90021 [2021-07-09 17:20:25,414 INFO L226 Difference]: Without dead ends: 90021 [2021-07-09 17:20:25,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:20:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-07-09 17:20:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-07-09 17:20:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-07-09 17:20:27,583 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-07-09 17:20:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:27,583 INFO L482 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-07-09 17:20:27,583 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 17:20:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-07-09 17:20:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:27,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:27,614 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:27,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9964,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:27,815 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-07-09 17:20:27,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:27,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109924051] [2021-07-09 17:20:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:27,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109924051] [2021-07-09 17:20:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109924051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012140499] [2021-07-09 17:20:27,892 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 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 17:20:27,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:20:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012140499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:27,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:27,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110012007] [2021-07-09 17:20:27,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:27,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:27,973 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:28,907 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-07-09 17:20:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:20:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:29,193 INFO L225 Difference]: With dead ends: 91085 [2021-07-09 17:20:29,193 INFO L226 Difference]: Without dead ends: 91085 [2021-07-09 17:20:29,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:20:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-07-09 17:20:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-07-09 17:20:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-07-09 17:20:31,609 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-07-09 17:20:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-07-09 17:20:31,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-07-09 17:20:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:31,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:31,639 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:31,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9965 [2021-07-09 17:20:31,841 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-07-09 17:20:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204975169] [2021-07-09 17:20:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:31,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:31,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204975169] [2021-07-09 17:20:31,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204975169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:31,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828891515] [2021-07-09 17:20:31,922 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 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 17:20:31,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:20:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:31,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828891515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:31,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:31,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347154293] [2021-07-09 17:20:31,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:31,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:31,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:31,996 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:32,969 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-07-09 17:20:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:20:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:33,261 INFO L225 Difference]: With dead ends: 89148 [2021-07-09 17:20:33,262 INFO L226 Difference]: Without dead ends: 89148 [2021-07-09 17:20:33,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:20:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-07-09 17:20:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-07-09 17:20:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-07-09 17:20:35,776 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-07-09 17:20:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:35,777 INFO L482 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-07-09 17:20:35,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-07-09 17:20:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:35,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:35,808 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:36,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9966,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:36,025 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-07-09 17:20:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:36,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026628438] [2021-07-09 17:20:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:36,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:36,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026628438] [2021-07-09 17:20:36,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026628438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:36,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798848931] [2021-07-09 17:20:36,111 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 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 17:20:36,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:20:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:36,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798848931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:36,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:36,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 17:20:36,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146449338] [2021-07-09 17:20:36,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:20:36,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:20:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:36,189 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:37,221 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-07-09 17:20:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:20:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-07-09 17:20:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:37,499 INFO L225 Difference]: With dead ends: 89118 [2021-07-09 17:20:37,500 INFO L226 Difference]: Without dead ends: 89118 [2021-07-09 17:20:37,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:20:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-07-09 17:20:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-07-09 17:20:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-07-09 17:20:40,025 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-07-09 17:20:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:40,025 INFO L482 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-07-09 17:20:40,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:20:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-07-09 17:20:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:40,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:40,059 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:40,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9967,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:40,273 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-07-09 17:20:40,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:40,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564086489] [2021-07-09 17:20:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:40,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:40,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564086489] [2021-07-09 17:20:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564086489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:40,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965548598] [2021-07-09 17:20:40,368 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 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 17:20:40,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:20:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:40,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965548598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:40,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:40,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:20:40,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804518959] [2021-07-09 17:20:40,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:20:40,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:20:40,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:40,432 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 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 17:20:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:41,232 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-07-09 17:20:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:20:41,232 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 22 [2021-07-09 17:20:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:41,546 INFO L225 Difference]: With dead ends: 87690 [2021-07-09 17:20:41,546 INFO L226 Difference]: Without dead ends: 87686 [2021-07-09 17:20:41,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:20:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-07-09 17:20:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-07-09 17:20:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-07-09 17:20:43,813 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-07-09 17:20:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:43,813 INFO L482 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-07-09 17:20:43,813 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 17:20:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-07-09 17:20:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:44,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:44,122 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:44,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9968,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:44,322 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-07-09 17:20:44,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:44,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583117830] [2021-07-09 17:20:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:44,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:44,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583117830] [2021-07-09 17:20:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583117830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:44,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316853294] [2021-07-09 17:20:44,406 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 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 17:20:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316853294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:44,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-09 17:20:44,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351387652] [2021-07-09 17:20:44,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:20:44,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:20:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:20:44,488 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:45,488 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-07-09 17:20:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:20:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-07-09 17:20:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:45,767 INFO L225 Difference]: With dead ends: 97092 [2021-07-09 17:20:45,767 INFO L226 Difference]: Without dead ends: 97092 [2021-07-09 17:20:45,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:20:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-07-09 17:20:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-07-09 17:20:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-07-09 17:20:48,351 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-07-09 17:20:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:48,351 INFO L482 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-07-09 17:20:48,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-07-09 17:20:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:48,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:48,397 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:48,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9969 [2021-07-09 17:20:48,597 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-07-09 17:20:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:48,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319529646] [2021-07-09 17:20:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:48,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:48,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319529646] [2021-07-09 17:20:48,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319529646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:48,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107389864] [2021-07-09 17:20:48,684 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 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 17:20:48,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:20:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107389864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:48,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:48,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-09 17:20:48,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645245121] [2021-07-09 17:20:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:20:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:20:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:20:48,767 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:49,809 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-07-09 17:20:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:20:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-07-09 17:20:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:50,121 INFO L225 Difference]: With dead ends: 97575 [2021-07-09 17:20:50,121 INFO L226 Difference]: Without dead ends: 97575 [2021-07-09 17:20:50,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:20:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-07-09 17:20:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-07-09 17:20:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-07-09 17:20:52,878 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-07-09 17:20:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:52,878 INFO L482 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-07-09 17:20:52,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-07-09 17:20:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:52,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:52,915 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:53,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:53,115 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-07-09 17:20:53,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:53,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390910520] [2021-07-09 17:20:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:53,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390910520] [2021-07-09 17:20:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390910520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363700442] [2021-07-09 17:20:53,206 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 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 17:20:53,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:20:53,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:53,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363700442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:53,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:53,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-09 17:20:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146014021] [2021-07-09 17:20:53,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:20:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:20:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:20:53,304 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:54,344 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-07-09 17:20:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:20:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-07-09 17:20:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:54,687 INFO L225 Difference]: With dead ends: 98465 [2021-07-09 17:20:54,687 INFO L226 Difference]: Without dead ends: 98465 [2021-07-09 17:20:54,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:20:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-07-09 17:20:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-07-09 17:20:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-07-09 17:20:57,417 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-07-09 17:20:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:57,417 INFO L482 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-07-09 17:20:57,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 17:20:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-07-09 17:20:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:20:57,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:57,459 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:57,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9971 [2021-07-09 17:20:57,660 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-07-09 17:20:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:57,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020651301] [2021-07-09 17:20:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:57,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020651301] [2021-07-09 17:20:57,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020651301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967518279] [2021-07-09 17:20:57,742 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 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 17:20:57,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:20:57,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:20:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:57,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967518279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:57,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:57,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-07-09 17:20:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719578984] [2021-07-09 17:20:57,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:20:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:20:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:57,801 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:58,713 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-07-09 17:20:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:20:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:20:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:59,013 INFO L225 Difference]: With dead ends: 96926 [2021-07-09 17:20:59,014 INFO L226 Difference]: Without dead ends: 96924 [2021-07-09 17:20:59,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:20:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-07-09 17:21:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-07-09 17:21:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-07-09 17:21:01,710 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-07-09 17:21:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:01,711 INFO L482 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-07-09 17:21:01,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-07-09 17:21:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:01,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:01,751 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:01,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9972 [2021-07-09 17:21:01,952 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-07-09 17:21:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:01,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081198854] [2021-07-09 17:21:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:02,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081198854] [2021-07-09 17:21:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081198854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107284856] [2021-07-09 17:21:02,034 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 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 17:21:02,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:21:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:02,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107284856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:02,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:02,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-07-09 17:21:02,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128312594] [2021-07-09 17:21:02,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:02,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:02,107 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:02,964 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-07-09 17:21:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:21:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:03,305 INFO L225 Difference]: With dead ends: 98650 [2021-07-09 17:21:03,305 INFO L226 Difference]: Without dead ends: 98650 [2021-07-09 17:21:03,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:21:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-07-09 17:21:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-07-09 17:21:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-07-09 17:21:05,974 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-07-09 17:21:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:05,974 INFO L482 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-07-09 17:21:05,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-07-09 17:21:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:06,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:06,014 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:06,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9973 [2021-07-09 17:21:06,215 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-07-09 17:21:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:06,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738965181] [2021-07-09 17:21:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738965181] [2021-07-09 17:21:06,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738965181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433632794] [2021-07-09 17:21:06,305 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 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 17:21:06,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:21:06,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:06,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433632794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:06,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-09 17:21:06,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172844262] [2021-07-09 17:21:06,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:06,383 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,734 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:21:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:07,342 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-07-09 17:21:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:21:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:07,702 INFO L225 Difference]: With dead ends: 100367 [2021-07-09 17:21:07,702 INFO L226 Difference]: Without dead ends: 100367 [2021-07-09 17:21:07,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:21:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-07-09 17:21:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-07-09 17:21:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-07-09 17:21:10,343 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-07-09 17:21:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:10,343 INFO L482 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-07-09 17:21:10,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-07-09 17:21:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:10,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:10,385 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:10,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9974 [2021-07-09 17:21:10,586 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-07-09 17:21:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:10,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666474992] [2021-07-09 17:21:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:10,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:10,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666474992] [2021-07-09 17:21:10,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666474992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:10,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104981956] [2021-07-09 17:21:10,683 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 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 17:21:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:11,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104981956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:11,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:11,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-09 17:21:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603970469] [2021-07-09 17:21:11,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:11,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:11,075 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:11,801 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-07-09 17:21:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:21:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:12,398 INFO L225 Difference]: With dead ends: 103852 [2021-07-09 17:21:12,398 INFO L226 Difference]: Without dead ends: 103852 [2021-07-09 17:21:12,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:21:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-07-09 17:21:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-07-09 17:21:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-07-09 17:21:15,227 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-07-09 17:21:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:15,227 INFO L482 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-07-09 17:21:15,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-07-09 17:21:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:15,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:15,266 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:15,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9975 [2021-07-09 17:21:15,467 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-07-09 17:21:15,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:15,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663511798] [2021-07-09 17:21:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663511798] [2021-07-09 17:21:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663511798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271404829] [2021-07-09 17:21:15,564 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 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 17:21:15,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:15,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:15,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271404829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:15,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-09 17:21:15,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478812984] [2021-07-09 17:21:15,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:15,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:15,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:15,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:15,642 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:16,697 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-07-09 17:21:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:21:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:17,099 INFO L225 Difference]: With dead ends: 117624 [2021-07-09 17:21:17,099 INFO L226 Difference]: Without dead ends: 117624 [2021-07-09 17:21:17,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:21:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-07-09 17:21:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-07-09 17:21:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-07-09 17:21:20,473 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-07-09 17:21:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,473 INFO L482 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-07-09 17:21:20,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-07-09 17:21:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:20,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,517 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9976,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,721 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-07-09 17:21:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499010586] [2021-07-09 17:21:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499010586] [2021-07-09 17:21:20,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499010586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871624817] [2021-07-09 17:21:20,802 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 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 17:21:20,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:21:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871624817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-09 17:21:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676645110] [2021-07-09 17:21:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:20,889 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:22,074 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-07-09 17:21:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:21:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:22,546 INFO L225 Difference]: With dead ends: 117101 [2021-07-09 17:21:22,546 INFO L226 Difference]: Without dead ends: 117101 [2021-07-09 17:21:22,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:21:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-07-09 17:21:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-07-09 17:21:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-07-09 17:21:26,100 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-07-09 17:21:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:26,101 INFO L482 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-07-09 17:21:26,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-07-09 17:21:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:26,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:26,143 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:26,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9977,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:26,344 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-07-09 17:21:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:26,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097834175] [2021-07-09 17:21:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097834175] [2021-07-09 17:21:26,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097834175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839520348] [2021-07-09 17:21:26,429 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 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 17:21:26,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839520348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:26,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-09 17:21:26,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130393674] [2021-07-09 17:21:26,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:26,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:26,516 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:27,576 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-07-09 17:21:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:21:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:27,982 INFO L225 Difference]: With dead ends: 129613 [2021-07-09 17:21:27,982 INFO L226 Difference]: Without dead ends: 129613 [2021-07-09 17:21:27,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:21:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-07-09 17:21:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-07-09 17:21:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-07-09 17:21:31,694 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-07-09 17:21:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-07-09 17:21:31,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-07-09 17:21:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:31,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:31,732 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:31,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:31,932 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-07-09 17:21:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:31,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001135105] [2021-07-09 17:21:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001135105] [2021-07-09 17:21:32,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001135105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713459471] [2021-07-09 17:21:32,019 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 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 17:21:32,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:21:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:32,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713459471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:32,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-09 17:21:32,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719944134] [2021-07-09 17:21:32,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:32,106 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:33,167 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-07-09 17:21:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:21:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:33,577 INFO L225 Difference]: With dead ends: 131498 [2021-07-09 17:21:33,577 INFO L226 Difference]: Without dead ends: 131498 [2021-07-09 17:21:33,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:21:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-07-09 17:21:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-07-09 17:21:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-07-09 17:21:37,464 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-07-09 17:21:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:37,464 INFO L482 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-07-09 17:21:37,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-07-09 17:21:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:37,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:37,511 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:37,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:37,713 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-07-09 17:21:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:37,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743477480] [2021-07-09 17:21:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743477480] [2021-07-09 17:21:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743477480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328295938] [2021-07-09 17:21:37,799 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 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 17:21:37,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:21:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328295938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:37,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-07-09 17:21:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851259155] [2021-07-09 17:21:37,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:21:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:21:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:37,892 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:39,026 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-07-09 17:21:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:21:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:39,506 INFO L225 Difference]: With dead ends: 132410 [2021-07-09 17:21:39,506 INFO L226 Difference]: Without dead ends: 132410 [2021-07-09 17:21:39,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:21:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-07-09 17:21:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-07-09 17:21:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-07-09 17:21:43,555 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-07-09 17:21:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:43,555 INFO L482 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-07-09 17:21:43,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-07-09 17:21:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:43,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:43,625 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:43,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9980,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:43,827 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:43,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:43,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-07-09 17:21:43,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:43,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929814815] [2021-07-09 17:21:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:43,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:43,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929814815] [2021-07-09 17:21:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929814815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:43,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991907997] [2021-07-09 17:21:43,913 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 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 17:21:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:44,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991907997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:44,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:44,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-07-09 17:21:44,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811397781] [2021-07-09 17:21:44,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:21:44,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:21:44,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:44,013 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:45,090 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-07-09 17:21:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:21:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 17:21:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:45,544 INFO L225 Difference]: With dead ends: 132757 [2021-07-09 17:21:45,545 INFO L226 Difference]: Without dead ends: 132757 [2021-07-09 17:21:45,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:21:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-07-09 17:21:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-07-09 17:21:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-07-09 17:21:49,711 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-07-09 17:21:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-07-09 17:21:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-07-09 17:21:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:21:49,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:49,764 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:49,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9981 [2021-07-09 17:21:49,964 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-07-09 17:21:49,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:49,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933003782] [2021-07-09 17:21:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:50,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933003782] [2021-07-09 17:21:50,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933003782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510768045] [2021-07-09 17:21:50,061 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 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 17:21:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:50,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:21:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510768045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:50,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-07-09 17:21:50,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797775377] [2021-07-09 17:21:50,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:21:50,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:21:50,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:50,159 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 17:21:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:51,379 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-07-09 17:21:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:21:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 22 [2021-07-09 17:21:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:51,888 INFO L225 Difference]: With dead ends: 135540 [2021-07-09 17:21:51,888 INFO L226 Difference]: Without dead ends: 135540 [2021-07-09 17:21:51,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:21:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-07-09 17:21:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-07-09 17:21:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-07-09 17:21:55,841 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-07-09 17:21:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,841 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-07-09 17:21:55,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 17:21:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-07-09 17:21:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:21:55,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,898 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:56,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9982,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,099 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-07-09 17:21:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:56,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438498466] [2021-07-09 17:21:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438498466] [2021-07-09 17:21:56,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438498466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366601096] [2021-07-09 17:21:56,202 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 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 17:21:56,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:21:56,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366601096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-07-09 17:21:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692693706] [2021-07-09 17:21:56,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:56,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:56,280 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 17:21:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,338 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-07-09 17:21:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:57,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-07-09 17:21:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,778 INFO L225 Difference]: With dead ends: 131316 [2021-07-09 17:21:57,778 INFO L226 Difference]: Without dead ends: 131310 [2021-07-09 17:21:57,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:21:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-07-09 17:22:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-07-09 17:22:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-07-09 17:22:02,032 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-07-09 17:22:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,032 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-07-09 17:22:02,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 17:22:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-07-09 17:22:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:02,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,093 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9983 [2021-07-09 17:22:02,310 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-07-09 17:22:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358242183] [2021-07-09 17:22:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358242183] [2021-07-09 17:22:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358242183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648370526] [2021-07-09 17:22:02,389 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 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 17:22:02,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:22:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:02,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648370526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:02,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-07-09 17:22:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812380893] [2021-07-09 17:22:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:22:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:22:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:02,494 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 17:22:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,592 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-07-09 17:22:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-07-09 17:22:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,122 INFO L225 Difference]: With dead ends: 131229 [2021-07-09 17:22:04,122 INFO L226 Difference]: Without dead ends: 131229 [2021-07-09 17:22:04,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-07-09 17:22:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-07-09 17:22:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-07-09 17:22:07,720 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-07-09 17:22:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,721 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-07-09 17:22:07,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 17:22:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-07-09 17:22:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:07,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,779 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9984 [2021-07-09 17:22:07,979 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-07-09 17:22:07,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898734291] [2021-07-09 17:22:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898734291] [2021-07-09 17:22:08,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898734291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708772112] [2021-07-09 17:22:08,400 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 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 17:22:08,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:22:08,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:08,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708772112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-07-09 17:22:08,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141703728] [2021-07-09 17:22:08,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:22:08,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:22:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:08,504 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 17:22:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,472 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-07-09 17:22:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-07-09 17:22:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,876 INFO L225 Difference]: With dead ends: 131237 [2021-07-09 17:22:09,876 INFO L226 Difference]: Without dead ends: 131237 [2021-07-09 17:22:09,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-07-09 17:22:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-07-09 17:22:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-07-09 17:22:13,335 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-07-09 17:22:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,335 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-07-09 17:22:13,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 17:22:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-07-09 17:22:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:13,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,394 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9985 [2021-07-09 17:22:13,595 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-07-09 17:22:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502820504] [2021-07-09 17:22:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502820504] [2021-07-09 17:22:13,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502820504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331712723] [2021-07-09 17:22:13,677 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 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 17:22:13,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:22:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331712723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:22:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044098761] [2021-07-09 17:22:13,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:22:13,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:22:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:13,742 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:22:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,753 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-07-09 17:22:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:14,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 24 [2021-07-09 17:22:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,384 INFO L225 Difference]: With dead ends: 131154 [2021-07-09 17:22:15,384 INFO L226 Difference]: Without dead ends: 131153 [2021-07-09 17:22:15,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-07-09 17:22:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-07-09 17:22:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-07-09 17:22:18,950 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-07-09 17:22:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,950 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-07-09 17:22:18,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:22:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-07-09 17:22:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:19,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,006 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9986 [2021-07-09 17:22:19,206 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-07-09 17:22:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146116380] [2021-07-09 17:22:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:19,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146116380] [2021-07-09 17:22:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146116380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402697077] [2021-07-09 17:22:19,264 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 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 17:22:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:19,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402697077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:22:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410111337] [2021-07-09 17:22:19,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:22:19,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:22:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:19,332 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 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 17:22:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,321 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-07-09 17:22:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:20,321 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 24 [2021-07-09 17:22:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,758 INFO L225 Difference]: With dead ends: 131454 [2021-07-09 17:22:20,759 INFO L226 Difference]: Without dead ends: 131452 [2021-07-09 17:22:20,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-07-09 17:22:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-07-09 17:22:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-07-09 17:22:24,669 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-07-09 17:22:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:24,669 INFO L482 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-07-09 17:22:24,669 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 17:22:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-07-09 17:22:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:24,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:24,723 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9987,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,923 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-07-09 17:22:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079046494] [2021-07-09 17:22:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:24,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079046494] [2021-07-09 17:22:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079046494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234775362] [2021-07-09 17:22:24,982 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 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 17:22:25,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:25,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:22:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:25,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234775362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:25,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:22:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290444584] [2021-07-09 17:22:25,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:22:25,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:22:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:25,056 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:22:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:26,050 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-07-09 17:22:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-07-09 17:22:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:26,493 INFO L225 Difference]: With dead ends: 131473 [2021-07-09 17:22:26,493 INFO L226 Difference]: Without dead ends: 131464 [2021-07-09 17:22:26,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-07-09 17:22:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-07-09 17:22:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-07-09 17:22:30,121 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-07-09 17:22:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,122 INFO L482 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-07-09 17:22:30,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:22:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-07-09 17:22:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:30,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,587 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9988,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,809 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-07-09 17:22:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801854162] [2021-07-09 17:22:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:30,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801854162] [2021-07-09 17:22:30,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801854162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471839242] [2021-07-09 17:22:30,873 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 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 17:22:30,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:22:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:22:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471839242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:22:30,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344474022] [2021-07-09 17:22:30,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:22:30,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:22:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:30,937 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 17:22:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:31,919 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-07-09 17:22:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-07-09 17:22:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:32,330 INFO L225 Difference]: With dead ends: 131345 [2021-07-09 17:22:32,330 INFO L226 Difference]: Without dead ends: 131343 [2021-07-09 17:22:32,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-07-09 17:22:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-07-09 17:22:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-07-09 17:22:36,189 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-07-09 17:22:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:36,189 INFO L482 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-07-09 17:22:36,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 17:22:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-07-09 17:22:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:36,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:36,250 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:36,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9989,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:36,450 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-07-09 17:22:36,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:36,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624221304] [2021-07-09 17:22:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:36,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:36,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624221304] [2021-07-09 17:22:36,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624221304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:36,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28030214] [2021-07-09 17:22:36,527 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 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 17:22:36,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:36,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:22:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:36,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28030214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:36,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:36,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-07-09 17:22:36,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029310649] [2021-07-09 17:22:36,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:22:36,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:22:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:36,585 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:37,780 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-07-09 17:22:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:22:37,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:22:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:38,431 INFO L225 Difference]: With dead ends: 131339 [2021-07-09 17:22:38,432 INFO L226 Difference]: Without dead ends: 131336 [2021-07-09 17:22:38,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:22:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-07-09 17:22:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-07-09 17:22:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-07-09 17:22:41,949 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-07-09 17:22:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-07-09 17:22:41,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-07-09 17:22:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:42,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:42,005 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:42,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-07-09 17:22:42,206 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-07-09 17:22:42,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:42,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455899683] [2021-07-09 17:22:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:42,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455899683] [2021-07-09 17:22:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455899683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111969463] [2021-07-09 17:22:42,289 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 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 17:22:42,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:22:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:22:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111969463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:42,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:42,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:22:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268267634] [2021-07-09 17:22:42,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:22:42,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:22:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:42,355 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:43,448 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-07-09 17:22:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:22:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:22:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:44,106 INFO L225 Difference]: With dead ends: 131264 [2021-07-09 17:22:44,106 INFO L226 Difference]: Without dead ends: 131259 [2021-07-09 17:22:44,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:22:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-07-09 17:22:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-07-09 17:22:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-07-09 17:22:47,740 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-07-09 17:22:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:47,741 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-07-09 17:22:47,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-07-09 17:22:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:47,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:47,797 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:47,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-07-09 17:22:47,998 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-07-09 17:22:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:47,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184098481] [2021-07-09 17:22:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:48,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:48,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184098481] [2021-07-09 17:22:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184098481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:48,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159779014] [2021-07-09 17:22:48,056 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 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 17:22:48,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:22:48,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:22:48,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159779014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:48,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:48,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:22:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129037386] [2021-07-09 17:22:48,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:22:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:22:48,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:48,130 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 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 17:22:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:49,176 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-07-09 17:22:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:49,177 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 24 [2021-07-09 17:22:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:49,614 INFO L225 Difference]: With dead ends: 131472 [2021-07-09 17:22:49,614 INFO L226 Difference]: Without dead ends: 131470 [2021-07-09 17:22:49,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-07-09 17:22:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-07-09 17:22:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-07-09 17:22:53,604 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-07-09 17:22:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:53,604 INFO L482 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-07-09 17:22:53,604 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 17:22:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-07-09 17:22:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:53,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:53,659 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:53,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9992,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:53,859 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-07-09 17:22:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:53,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136735167] [2021-07-09 17:22:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:53,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136735167] [2021-07-09 17:22:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136735167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879504360] [2021-07-09 17:22:53,916 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 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 17:22:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:22:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:22:53,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879504360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:53,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:22:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666386789] [2021-07-09 17:22:53,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:22:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:22:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:53,990 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:22:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:54,989 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-07-09 17:22:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-07-09 17:22:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:55,415 INFO L225 Difference]: With dead ends: 131509 [2021-07-09 17:22:55,415 INFO L226 Difference]: Without dead ends: 131502 [2021-07-09 17:22:55,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-07-09 17:22:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-07-09 17:22:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-07-09 17:22:58,991 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-07-09 17:22:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:58,991 INFO L482 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-07-09 17:22:58,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:22:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-07-09 17:22:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:22:59,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:59,436 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:59,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9993 [2021-07-09 17:22:59,649 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-07-09 17:22:59,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:59,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709698336] [2021-07-09 17:22:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:59,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:59,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709698336] [2021-07-09 17:22:59,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709698336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161998020] [2021-07-09 17:22:59,712 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 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 17:22:59,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:22:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:22:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161998020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:59,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-07-09 17:22:59,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26883015] [2021-07-09 17:22:59,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:22:59,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:22:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:59,777 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:00,755 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-07-09 17:23:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:23:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:01,167 INFO L225 Difference]: With dead ends: 131510 [2021-07-09 17:23:01,167 INFO L226 Difference]: Without dead ends: 131508 [2021-07-09 17:23:01,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:23:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-07-09 17:23:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-07-09 17:23:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-07-09 17:23:04,759 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-07-09 17:23:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:04,760 INFO L482 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-07-09 17:23:04,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-07-09 17:23:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:04,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:04,817 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:05,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-07-09 17:23:05,017 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:05,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-07-09 17:23:05,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:05,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174728399] [2021-07-09 17:23:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174728399] [2021-07-09 17:23:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174728399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414756310] [2021-07-09 17:23:05,086 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 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 17:23:05,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:23:05,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:23:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:05,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414756310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:05,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:05,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:23:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752138416] [2021-07-09 17:23:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:23:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:23:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:23:05,151 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:23:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:06,245 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-07-09 17:23:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 24 [2021-07-09 17:23:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:06,871 INFO L225 Difference]: With dead ends: 131365 [2021-07-09 17:23:06,871 INFO L226 Difference]: Without dead ends: 131362 [2021-07-09 17:23:06,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:23:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-07-09 17:23:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-07-09 17:23:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-07-09 17:23:10,662 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-07-09 17:23:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:10,662 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-07-09 17:23:10,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:23:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-07-09 17:23:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:10,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:10,722 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:10,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9995 [2021-07-09 17:23:10,922 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-07-09 17:23:10,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:10,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384065112] [2021-07-09 17:23:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:10,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:10,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384065112] [2021-07-09 17:23:10,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384065112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132887449] [2021-07-09 17:23:10,994 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 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 17:23:11,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:11,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:23:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:23:11,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132887449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:11,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:11,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:23:11,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125063667] [2021-07-09 17:23:11,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:23:11,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:23:11,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:11,058 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:12,153 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-07-09 17:23:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:23:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:23:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:12,806 INFO L225 Difference]: With dead ends: 131356 [2021-07-09 17:23:12,806 INFO L226 Difference]: Without dead ends: 131351 [2021-07-09 17:23:12,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:23:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-07-09 17:23:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-07-09 17:23:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-07-09 17:23:16,295 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-07-09 17:23:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:16,295 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-07-09 17:23:16,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-07-09 17:23:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:16,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:16,345 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:16,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9996 [2021-07-09 17:23:16,546 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-07-09 17:23:16,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:16,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786980745] [2021-07-09 17:23:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:16,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:16,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786980745] [2021-07-09 17:23:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786980745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992459635] [2021-07-09 17:23:16,624 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 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 17:23:16,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:23:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:23:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:23:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992459635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:16,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:23:16,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174482157] [2021-07-09 17:23:16,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:23:16,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:16,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:23:16,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:16,690 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:17,684 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-07-09 17:23:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:23:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:23:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:18,117 INFO L225 Difference]: With dead ends: 131372 [2021-07-09 17:23:18,118 INFO L226 Difference]: Without dead ends: 131369 [2021-07-09 17:23:18,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-07-09 17:23:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-07-09 17:23:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-07-09 17:23:21,920 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-07-09 17:23:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,921 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-07-09 17:23:21,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-07-09 17:23:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:21,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,970 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:22,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9997,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,171 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-07-09 17:23:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:22,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523075241] [2021-07-09 17:23:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:22,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523075241] [2021-07-09 17:23:22,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523075241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425476111] [2021-07-09 17:23:22,227 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 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 17:23:22,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:23:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:23:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:23:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425476111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:22,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:23:22,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425528014] [2021-07-09 17:23:22,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:23:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:23:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:23:22,297 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 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 17:23:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:23,263 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-07-09 17:23:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:23,263 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 24 [2021-07-09 17:23:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:23,695 INFO L225 Difference]: With dead ends: 131414 [2021-07-09 17:23:23,695 INFO L226 Difference]: Without dead ends: 131412 [2021-07-09 17:23:23,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:23:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-07-09 17:23:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-07-09 17:23:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-07-09 17:23:27,215 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-07-09 17:23:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,215 INFO L482 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-07-09 17:23:27,215 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 17:23:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-07-09 17:23:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:27,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,661 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9998 [2021-07-09 17:23:27,877 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-07-09 17:23:27,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687174606] [2021-07-09 17:23:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:27,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687174606] [2021-07-09 17:23:27,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687174606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785380226] [2021-07-09 17:23:27,932 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 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 17:23:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:23:27,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785380226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:23:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111762481] [2021-07-09 17:23:27,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:23:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:23:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:27,999 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:23:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:28,954 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-07-09 17:23:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-07-09 17:23:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:29,372 INFO L225 Difference]: With dead ends: 131457 [2021-07-09 17:23:29,372 INFO L226 Difference]: Without dead ends: 131452 [2021-07-09 17:23:29,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:23:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-07-09 17:23:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-07-09 17:23:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-07-09 17:23:32,914 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-07-09 17:23:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:32,914 INFO L482 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-07-09 17:23:32,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 17:23:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-07-09 17:23:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:32,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:32,972 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:33,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9999,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:33,173 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-07-09 17:23:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:33,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408864961] [2021-07-09 17:23:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408864961] [2021-07-09 17:23:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408864961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356908343] [2021-07-09 17:23:33,235 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 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 17:23:33,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:23:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:23:33,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356908343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-07-09 17:23:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314205516] [2021-07-09 17:23:33,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:23:33,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:23:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:23:33,308 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,389 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-07-09 17:23:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:23:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:35,046 INFO L225 Difference]: With dead ends: 131477 [2021-07-09 17:23:35,046 INFO L226 Difference]: Without dead ends: 131475 [2021-07-09 17:23:35,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-07-09 17:23:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-07-09 17:23:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-07-09 17:23:38,416 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-07-09 17:23:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:38,417 INFO L482 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-07-09 17:23:38,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-07-09 17:23:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:38,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:38,475 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:38,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10000 [2021-07-09 17:23:38,676 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-07-09 17:23:38,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:38,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629149014] [2021-07-09 17:23:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:38,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629149014] [2021-07-09 17:23:38,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629149014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652468648] [2021-07-09 17:23:38,744 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 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 17:23:38,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:23:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:38,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652468648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:38,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:23:38,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225415836] [2021-07-09 17:23:38,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:23:38,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:23:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:23:38,809 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:23:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,833 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-07-09 17:23:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:23:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 24 [2021-07-09 17:23:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:40,249 INFO L225 Difference]: With dead ends: 131340 [2021-07-09 17:23:40,249 INFO L226 Difference]: Without dead ends: 131337 [2021-07-09 17:23:40,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:23:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-07-09 17:23:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-07-09 17:23:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-07-09 17:23:44,150 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-07-09 17:23:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:44,151 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-07-09 17:23:44,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:23:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-07-09 17:23:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:44,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:44,199 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:44,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10001,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:44,400 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-07-09 17:23:44,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:44,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94578235] [2021-07-09 17:23:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:44,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94578235] [2021-07-09 17:23:44,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94578235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55414259] [2021-07-09 17:23:44,483 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 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 17:23:44,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:23:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:23:44,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55414259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:44,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-07-09 17:23:44,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167514899] [2021-07-09 17:23:44,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:23:44,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:23:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:44,542 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,587 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-07-09 17:23:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:23:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:46,047 INFO L225 Difference]: With dead ends: 131338 [2021-07-09 17:23:46,047 INFO L226 Difference]: Without dead ends: 131333 [2021-07-09 17:23:46,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:23:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-07-09 17:23:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-07-09 17:23:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-07-09 17:23:49,940 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-07-09 17:23:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:49,940 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-07-09 17:23:49,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-07-09 17:23:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:49,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:49,995 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:50,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10002 [2021-07-09 17:23:50,196 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-07-09 17:23:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960135837] [2021-07-09 17:23:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:50,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960135837] [2021-07-09 17:23:50,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960135837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141776856] [2021-07-09 17:23:50,273 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 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 17:23:50,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:23:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:23:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141776856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:50,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:23:50,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677867542] [2021-07-09 17:23:50,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:23:50,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:23:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:50,337 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 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 17:23:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:51,351 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-07-09 17:23:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:23:51,351 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 24 [2021-07-09 17:23:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:51,774 INFO L225 Difference]: With dead ends: 131408 [2021-07-09 17:23:51,775 INFO L226 Difference]: Without dead ends: 131405 [2021-07-09 17:23:51,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-07-09 17:23:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-07-09 17:23:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-07-09 17:23:55,234 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-07-09 17:23:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:55,234 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-07-09 17:23:55,234 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 17:23:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-07-09 17:23:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:23:55,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:55,290 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:55,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10003,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:55,490 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-07-09 17:23:55,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:55,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403702967] [2021-07-09 17:23:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:55,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403702967] [2021-07-09 17:23:55,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403702967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170565176] [2021-07-09 17:23:55,919 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 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 17:23:55,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:23:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:23:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170565176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:55,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:23:55,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112394410] [2021-07-09 17:23:55,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:23:55,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:23:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:55,992 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 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 17:23:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:56,921 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-07-09 17:23:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:23:56,921 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 24 [2021-07-09 17:23:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,309 INFO L225 Difference]: With dead ends: 131400 [2021-07-09 17:23:57,310 INFO L226 Difference]: Without dead ends: 131396 [2021-07-09 17:23:57,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-07-09 17:24:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-07-09 17:24:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-07-09 17:24:00,676 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-07-09 17:24:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:00,676 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-07-09 17:24:00,676 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 17:24:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-07-09 17:24:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:00,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:00,734 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:00,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10004 [2021-07-09 17:24:00,935 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-07-09 17:24:00,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:00,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63727109] [2021-07-09 17:24:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:01,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:01,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63727109] [2021-07-09 17:24:01,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63727109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476184906] [2021-07-09 17:24:01,008 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 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 17:24:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:24:01,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476184906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:01,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-07-09 17:24:01,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394195903] [2021-07-09 17:24:01,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:24:01,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:01,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:24:01,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:01,069 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:24:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:02,131 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-07-09 17:24:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 24 [2021-07-09 17:24:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:02,793 INFO L225 Difference]: With dead ends: 131360 [2021-07-09 17:24:02,793 INFO L226 Difference]: Without dead ends: 131357 [2021-07-09 17:24:02,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-07-09 17:24:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-07-09 17:24:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-07-09 17:24:06,476 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-07-09 17:24:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:06,476 INFO L482 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-07-09 17:24:06,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 17:24:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-07-09 17:24:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:06,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:06,530 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:06,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10005 [2021-07-09 17:24:06,730 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-07-09 17:24:06,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:06,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374878940] [2021-07-09 17:24:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374878940] [2021-07-09 17:24:06,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374878940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227542348] [2021-07-09 17:24:06,808 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 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 17:24:06,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:06,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227542348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:06,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-07-09 17:24:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048416911] [2021-07-09 17:24:06,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:24:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:06,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:24:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:06,868 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:07,950 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-07-09 17:24:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:24:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:08,394 INFO L225 Difference]: With dead ends: 131311 [2021-07-09 17:24:08,394 INFO L226 Difference]: Without dead ends: 131308 [2021-07-09 17:24:08,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-07-09 17:24:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-07-09 17:24:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-07-09 17:24:12,380 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-07-09 17:24:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:12,380 INFO L482 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-07-09 17:24:12,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-07-09 17:24:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:12,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:12,431 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:12,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10006 [2021-07-09 17:24:12,631 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-07-09 17:24:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:12,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943857485] [2021-07-09 17:24:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943857485] [2021-07-09 17:24:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943857485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772931380] [2021-07-09 17:24:12,711 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 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 17:24:12,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:24:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:12,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:24:12,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772931380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:24:12,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495379615] [2021-07-09 17:24:12,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:24:12,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:24:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:12,778 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 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 17:24:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,853 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-07-09 17:24:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:13,853 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 24 [2021-07-09 17:24:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:14,285 INFO L225 Difference]: With dead ends: 131552 [2021-07-09 17:24:14,285 INFO L226 Difference]: Without dead ends: 131544 [2021-07-09 17:24:14,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-07-09 17:24:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-07-09 17:24:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-07-09 17:24:18,541 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-07-09 17:24:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:18,541 INFO L482 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-07-09 17:24:18,541 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 17:24:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-07-09 17:24:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:18,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:18,603 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:18,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10007,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,804 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-07-09 17:24:18,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:18,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410710540] [2021-07-09 17:24:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:18,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:18,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410710540] [2021-07-09 17:24:18,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410710540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949426546] [2021-07-09 17:24:18,857 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 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 17:24:18,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:24:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949426546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:24:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847927181] [2021-07-09 17:24:18,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:24:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:24:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:24:18,922 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 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 17:24:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:19,873 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-07-09 17:24:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:19,873 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 24 [2021-07-09 17:24:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:20,299 INFO L225 Difference]: With dead ends: 131378 [2021-07-09 17:24:20,299 INFO L226 Difference]: Without dead ends: 131378 [2021-07-09 17:24:20,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-07-09 17:24:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-07-09 17:24:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-07-09 17:24:23,852 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-07-09 17:24:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,852 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-07-09 17:24:23,852 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 17:24:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-07-09 17:24:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:23,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,910 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:24,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-07-09 17:24:24,111 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-07-09 17:24:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:24,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503161463] [2021-07-09 17:24:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:24,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503161463] [2021-07-09 17:24:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503161463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351232652] [2021-07-09 17:24:24,163 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 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 17:24:24,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:24:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:24,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:24,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351232652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:24:24,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938653757] [2021-07-09 17:24:24,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:24:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:24:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:24,230 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:25,300 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-07-09 17:24:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:24:25,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:24:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:25,960 INFO L225 Difference]: With dead ends: 131464 [2021-07-09 17:24:25,961 INFO L226 Difference]: Without dead ends: 131461 [2021-07-09 17:24:25,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:24:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-07-09 17:24:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-07-09 17:24:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-07-09 17:24:29,429 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-07-09 17:24:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:29,429 INFO L482 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-07-09 17:24:29,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-07-09 17:24:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:29,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:29,489 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:29,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10009,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,690 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:29,690 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-07-09 17:24:29,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:29,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949655755] [2021-07-09 17:24:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949655755] [2021-07-09 17:24:29,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949655755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367193118] [2021-07-09 17:24:29,756 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 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 17:24:29,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:24:29,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367193118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:29,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:24:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577659936] [2021-07-09 17:24:29,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:24:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:24:29,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:29,823 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:24:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:30,898 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-07-09 17:24:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 24 [2021-07-09 17:24:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:31,538 INFO L225 Difference]: With dead ends: 131365 [2021-07-09 17:24:31,538 INFO L226 Difference]: Without dead ends: 131358 [2021-07-09 17:24:31,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-07-09 17:24:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-07-09 17:24:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-07-09 17:24:35,203 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-07-09 17:24:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,203 INFO L482 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-07-09 17:24:35,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:24:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-07-09 17:24:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:35,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,261 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10010,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:35,462 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,462 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-07-09 17:24:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135494168] [2021-07-09 17:24:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:35,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135494168] [2021-07-09 17:24:35,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135494168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325888899] [2021-07-09 17:24:35,533 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 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 17:24:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:24:35,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325888899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:35,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:24:35,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079884647] [2021-07-09 17:24:35,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:24:35,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:24:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:35,597 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:36,668 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-07-09 17:24:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:24:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,090 INFO L225 Difference]: With dead ends: 131320 [2021-07-09 17:24:37,090 INFO L226 Difference]: Without dead ends: 131315 [2021-07-09 17:24:37,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-07-09 17:24:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-07-09 17:24:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-07-09 17:24:41,059 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-07-09 17:24:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,059 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-07-09 17:24:41,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-07-09 17:24:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:41,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,109 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-07-09 17:24:41,309 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-07-09 17:24:41,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256558922] [2021-07-09 17:24:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256558922] [2021-07-09 17:24:41,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256558922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970967683] [2021-07-09 17:24:41,392 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 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 17:24:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:41,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:41,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970967683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:41,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-07-09 17:24:41,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250974853] [2021-07-09 17:24:41,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:24:41,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:24:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:41,455 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:42,527 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-07-09 17:24:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:24:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:24:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:42,957 INFO L225 Difference]: With dead ends: 131318 [2021-07-09 17:24:42,958 INFO L226 Difference]: Without dead ends: 131312 [2021-07-09 17:24:42,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-07-09 17:24:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-07-09 17:24:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-07-09 17:24:46,561 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-07-09 17:24:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,561 INFO L482 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-07-09 17:24:46,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-07-09 17:24:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:46,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,994 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:47,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10012 [2021-07-09 17:24:47,210 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-07-09 17:24:47,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:47,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141752467] [2021-07-09 17:24:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141752467] [2021-07-09 17:24:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141752467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919169958] [2021-07-09 17:24:47,300 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 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 17:24:47,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:24:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:24:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919169958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:47,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-07-09 17:24:47,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166881537] [2021-07-09 17:24:47,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:24:47,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:24:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:47,372 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:24:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,409 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-07-09 17:24:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:24:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-07-09 17:24:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,835 INFO L225 Difference]: With dead ends: 131674 [2021-07-09 17:24:48,835 INFO L226 Difference]: Without dead ends: 131666 [2021-07-09 17:24:48,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-07-09 17:24:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-07-09 17:24:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-07-09 17:24:52,727 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-07-09 17:24:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:52,727 INFO L482 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-07-09 17:24:52,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:24:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-07-09 17:24:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:52,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:52,784 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:52,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10013 [2021-07-09 17:24:52,985 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-07-09 17:24:52,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:52,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220710639] [2021-07-09 17:24:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:53,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220710639] [2021-07-09 17:24:53,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220710639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670680351] [2021-07-09 17:24:53,070 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 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 17:24:53,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:53,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:24:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:53,452 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 17:24:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:24:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670680351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-07-09 17:24:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919037311] [2021-07-09 17:24:53,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:24:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:24:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:53,483 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:54,510 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-07-09 17:24:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:54,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:24:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:54,948 INFO L225 Difference]: With dead ends: 131661 [2021-07-09 17:24:54,948 INFO L226 Difference]: Without dead ends: 131646 [2021-07-09 17:24:54,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-07-09 17:24:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-07-09 17:24:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-07-09 17:24:58,454 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-07-09 17:24:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:58,454 INFO L482 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-07-09 17:24:58,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-07-09 17:24:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:24:58,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:58,514 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:58,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10014 [2021-07-09 17:24:58,715 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:58,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-07-09 17:24:58,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:58,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966197506] [2021-07-09 17:24:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:58,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:58,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966197506] [2021-07-09 17:24:58,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966197506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576235224] [2021-07-09 17:24:58,815 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 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 17:24:58,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:24:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:24:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:58,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576235224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:58,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:58,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:24:58,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007088049] [2021-07-09 17:24:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:24:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:24:58,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:24:58,908 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 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 17:24:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:59,966 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-07-09 17:24:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:59,966 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 24 [2021-07-09 17:24:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:00,649 INFO L225 Difference]: With dead ends: 131394 [2021-07-09 17:25:00,649 INFO L226 Difference]: Without dead ends: 131390 [2021-07-09 17:25:00,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-07-09 17:25:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-07-09 17:25:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-07-09 17:25:04,353 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-07-09 17:25:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:04,353 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-07-09 17:25:04,353 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 17:25:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-07-09 17:25:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:04,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:04,409 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10015 [2021-07-09 17:25:04,609 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-07-09 17:25:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:04,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571479279] [2021-07-09 17:25:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571479279] [2021-07-09 17:25:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571479279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872545445] [2021-07-09 17:25:04,691 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 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 17:25:04,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:25:04,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872545445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:04,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:04,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-07-09 17:25:04,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516526049] [2021-07-09 17:25:04,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:25:04,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:04,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:25:04,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:04,763 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:25:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:05,888 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-07-09 17:25:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:25:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-07-09 17:25:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:06,360 INFO L225 Difference]: With dead ends: 131351 [2021-07-09 17:25:06,360 INFO L226 Difference]: Without dead ends: 131347 [2021-07-09 17:25:06,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-07-09 17:25:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-07-09 17:25:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-07-09 17:25:10,309 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-07-09 17:25:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:10,309 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-07-09 17:25:10,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:25:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-07-09 17:25:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:10,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:10,360 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:10,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10016,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:10,561 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-07-09 17:25:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630336159] [2021-07-09 17:25:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630336159] [2021-07-09 17:25:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630336159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699333762] [2021-07-09 17:25:10,648 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 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 17:25:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:25:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:25:10,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699333762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:10,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-07-09 17:25:10,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213815548] [2021-07-09 17:25:10,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:25:10,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:25:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:10,714 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:11,830 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-07-09 17:25:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:25:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:12,287 INFO L225 Difference]: With dead ends: 131763 [2021-07-09 17:25:12,287 INFO L226 Difference]: Without dead ends: 131748 [2021-07-09 17:25:12,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:25:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-07-09 17:25:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-07-09 17:25:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-07-09 17:25:16,327 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-07-09 17:25:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:16,327 INFO L482 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-07-09 17:25:16,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-07-09 17:25:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:16,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:16,379 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:16,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-07-09 17:25:16,579 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-07-09 17:25:16,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:16,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283581255] [2021-07-09 17:25:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:16,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283581255] [2021-07-09 17:25:16,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283581255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855748162] [2021-07-09 17:25:16,632 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 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 17:25:16,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:16,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:25:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:25:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855748162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:16,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:25:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984995322] [2021-07-09 17:25:16,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:25:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:25:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:25:16,699 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:17,664 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-07-09 17:25:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:25:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:25:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:18,068 INFO L225 Difference]: With dead ends: 131485 [2021-07-09 17:25:18,068 INFO L226 Difference]: Without dead ends: 131485 [2021-07-09 17:25:18,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-07-09 17:25:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-07-09 17:25:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-07-09 17:25:21,700 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-07-09 17:25:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:21,700 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-07-09 17:25:21,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-07-09 17:25:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:21,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:21,757 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:21,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10018 [2021-07-09 17:25:21,957 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-07-09 17:25:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:21,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489032719] [2021-07-09 17:25:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:22,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:22,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489032719] [2021-07-09 17:25:22,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489032719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:22,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916434225] [2021-07-09 17:25:22,021 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 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 17:25:22,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:25:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:22,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916434225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:22,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:22,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:25:22,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281594666] [2021-07-09 17:25:22,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:25:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:25:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:22,444 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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 17:25:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:23,422 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-07-09 17:25:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:25:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 24 [2021-07-09 17:25:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:23,799 INFO L225 Difference]: With dead ends: 131333 [2021-07-09 17:25:23,799 INFO L226 Difference]: Without dead ends: 131328 [2021-07-09 17:25:23,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:25:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-07-09 17:25:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-07-09 17:25:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-07-09 17:25:27,480 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-07-09 17:25:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,480 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-07-09 17:25:27,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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 17:25:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-07-09 17:25:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:27,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,533 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10019,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:27,733 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-07-09 17:25:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274169437] [2021-07-09 17:25:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274169437] [2021-07-09 17:25:27,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274169437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431098539] [2021-07-09 17:25:27,800 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 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 17:25:27,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:25:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:25:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431098539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:27,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:27,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-09 17:25:27,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280914276] [2021-07-09 17:25:27,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:25:27,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:25:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:25:27,866 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,949 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-07-09 17:25:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:25:28,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:25:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:29,595 INFO L225 Difference]: With dead ends: 131314 [2021-07-09 17:25:29,596 INFO L226 Difference]: Without dead ends: 131309 [2021-07-09 17:25:29,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:29,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-07-09 17:25:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-07-09 17:25:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-07-09 17:25:33,115 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-07-09 17:25:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-07-09 17:25:33,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-07-09 17:25:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:33,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:33,168 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10020 [2021-07-09 17:25:33,368 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-07-09 17:25:33,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374405313] [2021-07-09 17:25:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:33,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374405313] [2021-07-09 17:25:33,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374405313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211470147] [2021-07-09 17:25:33,443 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 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 17:25:33,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:25:33,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:33,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211470147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:33,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:25:33,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850181981] [2021-07-09 17:25:33,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:25:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:25:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:25:33,517 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 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 17:25:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:34,565 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-07-09 17:25:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:25:34,565 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 24 [2021-07-09 17:25:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:34,990 INFO L225 Difference]: With dead ends: 132743 [2021-07-09 17:25:34,990 INFO L226 Difference]: Without dead ends: 132740 [2021-07-09 17:25:34,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-07-09 17:25:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-07-09 17:25:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-07-09 17:25:38,849 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-07-09 17:25:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:38,849 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-07-09 17:25:38,849 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 17:25:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-07-09 17:25:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:38,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:38,898 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:39,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10021,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:39,099 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-07-09 17:25:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:39,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988243437] [2021-07-09 17:25:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:39,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988243437] [2021-07-09 17:25:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988243437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336885975] [2021-07-09 17:25:39,177 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 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 17:25:39,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:25:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336885975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:39,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-07-09 17:25:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388142544] [2021-07-09 17:25:39,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:25:39,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:39,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:25:39,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:39,250 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:25:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:40,302 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-07-09 17:25:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:25:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-07-09 17:25:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:40,729 INFO L225 Difference]: With dead ends: 132748 [2021-07-09 17:25:40,730 INFO L226 Difference]: Without dead ends: 132740 [2021-07-09 17:25:40,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-07-09 17:25:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-07-09 17:25:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-07-09 17:25:44,317 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-07-09 17:25:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,318 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-07-09 17:25:44,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 17:25:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-07-09 17:25:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:25:44,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,762 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:44,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-07-09 17:25:44,968 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-07-09 17:25:44,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:44,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859042771] [2021-07-09 17:25:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859042771] [2021-07-09 17:25:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859042771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940609244] [2021-07-09 17:25:45,058 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 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 17:25:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:25:45,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940609244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:45,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-07-09 17:25:45,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751674024] [2021-07-09 17:25:45,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:25:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:25:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:45,125 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 17:25:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:25:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10023 [2021-07-09 17:25:45,700 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:25:45,703 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:25:45,704 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:25:45,705 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:25:45 BasicIcfg [2021-07-09 17:25:45,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:25:45,705 INFO L168 Benchmark]: Toolchain (without parser) took 777821.92 ms. Allocated memory was 223.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 202.6 MB in the beginning and 5.1 GB in the end (delta: -4.9 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-07-09 17:25:45,705 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 203.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:25:45,705 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.07 ms. Allocated memory is still 223.3 MB. Free memory was 202.4 MB in the beginning and 201.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:25:45,705 INFO L168 Benchmark]: Boogie Preprocessor took 14.50 ms. Allocated memory is still 223.3 MB. Free memory was 201.1 MB in the beginning and 200.1 MB in the end (delta: 963.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:25:45,705 INFO L168 Benchmark]: RCFGBuilder took 341.81 ms. Allocated memory is still 223.3 MB. Free memory was 200.1 MB in the beginning and 185.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-07-09 17:25:45,705 INFO L168 Benchmark]: TraceAbstraction took 777439.86 ms. Allocated memory was 223.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 184.6 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-07-09 17:25:45,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 203.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.07 ms. Allocated memory is still 223.3 MB. Free memory was 202.4 MB in the beginning and 201.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.50 ms. Allocated memory is still 223.3 MB. Free memory was 201.1 MB in the beginning and 200.1 MB in the end (delta: 963.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.81 ms. Allocated memory is still 223.3 MB. Free memory was 200.1 MB in the beginning and 185.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 777439.86 ms. Allocated memory was 223.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 184.6 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (131124states) and FLOYD_HOARE automaton (currently 24 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (62386 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 777335.9ms, OverallIterations: 317, TraceHistogramMax: 12, EmptinessCheckTime: 7253.8ms, AutomataDifference: 158839.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5419 SDtfs, 24545 SDslu, 31067 SDs, 0 SdLazy, 41526 SolverSat, 7929 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17506.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13260 GetRequests, 6052 SyntacticMatches, 165 SemanticMatches, 7043 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45492 ImplicationChecksByTransitivity, 43142.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131189occurred in iteration=286, InterpolantAutomatonStates: 6183, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 306154.4ms AutomataMinimizationTime, 316 MinimizatonAttempts, 525252 StatesRemovedByMinimization, 311 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 908.9ms SsaConstructionTime, 3205.0ms SatisfiabilityAnalysisTime, 230501.6ms InterpolantComputationTime, 12773 NumberOfCodeBlocks, 12772 NumberOfCodeBlocksAsserted, 1414 NumberOfCheckSat, 12142 ConstructedInterpolants, 0 QuantifiedInterpolants, 53794 SizeOfPredicates, 155 NumberOfNonLiveVariables, 25889 ConjunctsInSsa, 4356 ConjunctsInUnsatCore, 631 InterpolantComputations, 3 PerfectInterpolantSequences, 10563/29914 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown