/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-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:18:21,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:18:21,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:18:21,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:18:21,163 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 17:18:21,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:18:21,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:18:21,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:18:21,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:18:21,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:18:21,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:18:21,201 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:18:21,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:18:21,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:18:21,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:18:21,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:18:21,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:18:21,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:18:21,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:18:21,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:18:21,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:18:21,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:18:21,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:18:21,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:18:21,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:18:21,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:18:21,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:18:21,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:18:21,526 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:18:21,527 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:18:21,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-07-09 17:18:21,528 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-07-09 17:18:21,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:18:21,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:18:21,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:18:21,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:18:21,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:18:21,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:18:21,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:18:21,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:18:21,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:18:21,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/1) ... [2021-07-09 17:18:21,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:18:21,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:18:21,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:18:21,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:18:21,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (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 17:18:21,683 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:18:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:18:21,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:18:21,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:18:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:18:21,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:18:21,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:18:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:18:21,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:18:21,686 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 17:18:21,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:18:21,913 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:18:21,913 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:18:21,914 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:18:21,915 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:18:21 BoogieIcfgContainer [2021-07-09 17:18:21,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:18:21,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:18:21,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:18:21,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:18:21,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:18:21" (1/2) ... [2021-07-09 17:18:21,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210051ad and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:18:21, skipping insertion in model container [2021-07-09 17:18:21,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:18:21" (2/2) ... [2021-07-09 17:18:21,920 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-07-09 17:18:21,925 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:18:21,925 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:18:21,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:18:21,925 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:18:21,949 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:18:21,966 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:18:21,981 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:18:21,981 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:18:21,981 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:18:21,981 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:18:21,981 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:18:21,981 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:18:21,982 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:18:21,982 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:18:21,988 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-09 17:18:21,997 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 17:18:21,998 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 17:18:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-09 17:18:22,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:22,004 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:22,004 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:22,008 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-07-09 17:18:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:22,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384335769] [2021-07-09 17:18:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:22,169 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 17:18:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384335769] [2021-07-09 17:18:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384335769] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:18:22,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:18:22,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:18:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582978328] [2021-07-09 17:18:22,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:18:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:22,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:18:22,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:18:22,197 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 17:18:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:22,234 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-09 17:18:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:18:22,236 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 17:18:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:22,245 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:18:22,246 INFO L226 Difference]: Without dead ends: 19 [2021-07-09 17:18:22,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:18:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-09 17:18:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-09 17:18:22,277 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 17:18:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-09 17:18:22,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-09 17:18:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:22,280 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-09 17:18:22,280 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 17:18:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-09 17:18:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:18:22,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:22,282 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:22,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:18:22,283 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-07-09 17:18:22,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:22,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209117394] [2021-07-09 17:18:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:22,366 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 17:18:22,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:22,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209117394] [2021-07-09 17:18:22,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209117394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:22,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783204178] [2021-07-09 17:18:22,367 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 17:18:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:18:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:22,514 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 17:18:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783204178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:22,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:22,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 17:18:22,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654926352] [2021-07-09 17:18:22,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:18:22,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:18:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:18:22,524 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:22,592 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-09 17:18:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:18:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 17:18:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:22,593 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:18:22,594 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:18:22,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:18:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:18:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-09 17:18:22,597 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 17:18:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-09 17:18:22,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-09 17:18:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:22,598 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-09 17:18:22,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-09 17:18:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:18:22,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:22,599 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:22,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:18:22,817 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-07-09 17:18:22,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:22,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206250988] [2021-07-09 17:18:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:22,846 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 17:18:22,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206250988] [2021-07-09 17:18:22,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206250988] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:18:22,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:18:22,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:18:22,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874209595] [2021-07-09 17:18:22,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:18:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:22,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:18:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:18:22,853 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 17:18:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:22,888 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-09 17:18:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:18:22,888 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 17:18:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:22,893 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:18:22,893 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:18:22,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:18:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:18:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:18:22,900 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 17:18:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-09 17:18:22,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-09 17:18:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:22,901 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-09 17:18:22,901 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 17:18:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-09 17:18:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:18:22,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:22,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:22,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:18:22,902 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-07-09 17:18:22,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:22,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385363208] [2021-07-09 17:18:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:22,975 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 17:18:22,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:22,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385363208] [2021-07-09 17:18:22,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385363208] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:18:22,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:18:22,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:18:22,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836118253] [2021-07-09 17:18:22,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:18:22,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:18:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:18:22,978 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 17:18:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:23,003 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-09 17:18:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:18:23,004 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 17:18:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:23,005 INFO L225 Difference]: With dead ends: 20 [2021-07-09 17:18:23,005 INFO L226 Difference]: Without dead ends: 20 [2021-07-09 17:18:23,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 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 17:18:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-09 17:18:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-09 17:18:23,010 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 17:18:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:18:23,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:18:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:23,011 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:18:23,011 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 17:18:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:18:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:18:23,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:23,012 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:23,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:18:23,012 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-07-09 17:18:23,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:23,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388759474] [2021-07-09 17:18:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,041 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 17:18:23,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388759474] [2021-07-09 17:18:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388759474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254639218] [2021-07-09 17:18:23,042 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 17:18:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:18:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:23,124 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 17:18:23,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254639218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:23,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:18:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053998557] [2021-07-09 17:18:23,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:18:23,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:18:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:18:23,127 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 17:18:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:23,139 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-09 17:18:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:18:23,140 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 17:18:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:23,140 INFO L225 Difference]: With dead ends: 24 [2021-07-09 17:18:23,140 INFO L226 Difference]: Without dead ends: 24 [2021-07-09 17:18:23,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:18:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-09 17:18:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-09 17:18:23,143 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 17:18:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-09 17:18:23,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-09 17:18:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:23,144 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-09 17:18:23,144 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 17:18:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-09 17:18:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:18:23,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:23,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:23,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:23,375 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-07-09 17:18:23,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:23,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113789857] [2021-07-09 17:18:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,436 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 17:18:23,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:23,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113789857] [2021-07-09 17:18:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113789857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266272045] [2021-07-09 17:18:23,437 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 17:18:23,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:23,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:18:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:23,507 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 17:18:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266272045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:18:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348578620] [2021-07-09 17:18:23,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:18:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:18:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:18:23,509 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:23,538 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:18:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:18:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 17:18:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:23,546 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:18:23,546 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:18:23,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:18:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:18:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-09 17:18:23,549 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 17:18:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-07-09 17:18:23,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-07-09 17:18:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:23,550 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-07-09 17:18:23,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-07-09 17:18:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:18:23,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:23,551 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:23,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:23,765 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-07-09 17:18:23,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:23,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758160801] [2021-07-09 17:18:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,828 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 17:18:23,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:23,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758160801] [2021-07-09 17:18:23,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758160801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286990362] [2021-07-09 17:18:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:23,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:18:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:23,951 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 17:18:23,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286990362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:23,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:18:23,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546811474] [2021-07-09 17:18:23,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:18:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:18:23,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:18:23,953 INFO L87 Difference]: Start difference. First operand 28 states and 51 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 17:18:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:23,999 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-07-09 17:18:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:18:24,000 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 13 [2021-07-09 17:18:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:24,002 INFO L225 Difference]: With dead ends: 32 [2021-07-09 17:18:24,002 INFO L226 Difference]: Without dead ends: 32 [2021-07-09 17:18:24,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:18:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-09 17:18:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-07-09 17:18:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-07-09 17:18:24,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-07-09 17:18:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:24,017 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-07-09 17:18:24,017 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 17:18:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-07-09 17:18:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:18:24,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:24,018 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:24,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:24,237 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-07-09 17:18:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:24,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742498369] [2021-07-09 17:18:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:24,320 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 17:18:24,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:24,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742498369] [2021-07-09 17:18:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742498369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649617044] [2021-07-09 17:18:24,321 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 17:18:24,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:18:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:24,422 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 17:18:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649617044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:24,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:24,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 17:18:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105791457] [2021-07-09 17:18:24,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:24,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:24,425 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 17:18:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:24,461 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-07-09 17:18:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:18:24,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 14 [2021-07-09 17:18:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:24,462 INFO L225 Difference]: With dead ends: 36 [2021-07-09 17:18:24,462 INFO L226 Difference]: Without dead ends: 36 [2021-07-09 17:18:24,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-09 17:18:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-09 17:18:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-09 17:18:24,466 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-07-09 17:18:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:24,467 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-09 17:18:24,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 17:18:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-09 17:18:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:24,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:24,467 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:24,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:24,693 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-07-09 17:18:24,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:24,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857463139] [2021-07-09 17:18:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:24,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857463139] [2021-07-09 17:18:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857463139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499036904] [2021-07-09 17:18:24,766 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 17:18:24,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:18:24,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:24,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:25,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:25,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:25,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:25,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:25,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499036904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:25,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666440251] [2021-07-09 17:18:25,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:25,232 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 17:18:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:25,345 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-07-09 17:18:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:18:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:25,348 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:18:25,348 INFO L226 Difference]: Without dead ends: 90 [2021-07-09 17:18:25,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-09 17:18:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-07-09 17:18:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-07-09 17:18:25,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-07-09 17:18:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:25,353 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-07-09 17:18:25,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 17:18:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-07-09 17:18:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:25,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:25,354 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:25,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:25,569 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-07-09 17:18:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:25,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25893721] [2021-07-09 17:18:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:25,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25893721] [2021-07-09 17:18:25,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25893721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046218558] [2021-07-09 17:18:25,631 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:25,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:25,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:25,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:26,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:26,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:26,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:26,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:26,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046218558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:26,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812768565] [2021-07-09 17:18:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:26,063 INFO L87 Difference]: Start difference. First operand 49 states and 106 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 17:18:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:26,170 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-07-09 17:18:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:26,171 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 15 [2021-07-09 17:18:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:26,172 INFO L225 Difference]: With dead ends: 103 [2021-07-09 17:18:26,172 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:18:26,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:18:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-07-09 17:18:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-07-09 17:18:26,190 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-07-09 17:18:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:26,190 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-07-09 17:18:26,190 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 17:18:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-07-09 17:18:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:26,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:26,191 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:26,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:26,397 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-07-09 17:18:26,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:26,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592272893] [2021-07-09 17:18:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:26,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592272893] [2021-07-09 17:18:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592272893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027339799] [2021-07-09 17:18:26,470 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 17:18:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:26,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:26,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:26,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:26,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:26,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:26,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:26,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027339799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:26,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355388110] [2021-07-09 17:18:26,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:26,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:26,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:26,736 INFO L87 Difference]: Start difference. First operand 57 states and 135 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 17:18:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:26,829 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-07-09 17:18:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:26,829 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 15 [2021-07-09 17:18:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:26,830 INFO L225 Difference]: With dead ends: 113 [2021-07-09 17:18:26,830 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:18:26,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:18:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-07-09 17:18:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-07-09 17:18:26,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-07-09 17:18:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:26,843 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-07-09 17:18:26,843 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 17:18:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-07-09 17:18:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:26,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:26,844 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:27,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:18:27,057 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:27,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-07-09 17:18:27,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:27,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351963160] [2021-07-09 17:18:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:27,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:27,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351963160] [2021-07-09 17:18:27,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351963160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:27,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639903901] [2021-07-09 17:18:27,115 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 17:18:27,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:27,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:27,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:27,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:27,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:27,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:27,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639903901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:27,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:27,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845979202] [2021-07-09 17:18:27,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:27,375 INFO L87 Difference]: Start difference. First operand 66 states and 167 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 17:18:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:27,458 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-07-09 17:18:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:27,459 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 15 [2021-07-09 17:18:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:27,460 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:18:27,460 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:18:27,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:18:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-07-09 17:18:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-07-09 17:18:27,464 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-07-09 17:18:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:27,464 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-07-09 17:18:27,465 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 17:18:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-07-09 17:18:27,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:27,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:27,466 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:27,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:27,681 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-07-09 17:18:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:27,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107598024] [2021-07-09 17:18:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:27,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107598024] [2021-07-09 17:18:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107598024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550582512] [2021-07-09 17:18:27,722 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 17:18:27,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:27,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:27,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:27,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:27,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:27,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:27,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:27,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:27,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550582512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:27,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:27,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:27,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592219471] [2021-07-09 17:18:27,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:27,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:27,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:27,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:27,950 INFO L87 Difference]: Start difference. First operand 76 states and 202 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 17:18:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:28,023 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-07-09 17:18:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:28,023 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 15 [2021-07-09 17:18:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:28,024 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:18:28,024 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:18:28,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:18:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-07-09 17:18:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-07-09 17:18:28,029 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-07-09 17:18:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:28,029 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-07-09 17:18:28,029 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 17:18:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-07-09 17:18:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:18:28,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:28,030 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:28,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:18:28,245 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-07-09 17:18:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:28,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845406841] [2021-07-09 17:18:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:28,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:28,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845406841] [2021-07-09 17:18:28,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845406841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721889332] [2021-07-09 17:18:28,302 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 17:18:28,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:28,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:18:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:28,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:28,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:18:28,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:28,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:28,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:28,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:18:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:28,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721889332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:28,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 17:18:28,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536131827] [2021-07-09 17:18:28,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:28,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:28,543 INFO L87 Difference]: Start difference. First operand 87 states and 240 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 17:18:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:28,631 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-07-09 17:18:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:28,631 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 15 [2021-07-09 17:18:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:28,632 INFO L225 Difference]: With dead ends: 149 [2021-07-09 17:18:28,632 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:18:28,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:18:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-07-09 17:18:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-07-09 17:18:28,637 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-07-09 17:18:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:28,637 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-07-09 17:18:28,638 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 17:18:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-07-09 17:18:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:28,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:28,641 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:28,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:28,865 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-07-09 17:18:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658964769] [2021-07-09 17:18:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:28,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658964769] [2021-07-09 17:18:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658964769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850380573] [2021-07-09 17:18:28,930 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 17:18:28,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:18:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:29,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850380573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:29,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882008826] [2021-07-09 17:18:29,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:29,022 INFO L87 Difference]: Start difference. First operand 100 states and 282 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 17:18:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:29,152 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-07-09 17:18:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:18:29,152 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 16 [2021-07-09 17:18:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:29,153 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:18:29,153 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:18:29,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:18:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-07-09 17:18:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-07-09 17:18:29,158 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-07-09 17:18:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:29,158 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-07-09 17:18:29,158 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 17:18:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-07-09 17:18:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:29,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:29,159 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:29,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:18:29,373 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-07-09 17:18:29,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:29,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185571892] [2021-07-09 17:18:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:29,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185571892] [2021-07-09 17:18:29,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185571892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923065307] [2021-07-09 17:18:29,431 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 17:18:29,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:29,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:29,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923065307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:29,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015457360] [2021-07-09 17:18:29,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:29,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:29,506 INFO L87 Difference]: Start difference. First operand 103 states and 290 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 17:18:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:29,680 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-07-09 17:18:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:29,680 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 16 [2021-07-09 17:18:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:29,681 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:18:29,682 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:18:29,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:18:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-07-09 17:18:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-07-09 17:18:29,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-07-09 17:18:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:29,687 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-07-09 17:18:29,688 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 17:18:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-07-09 17:18:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:29,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:29,688 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:29,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 17:18:29,905 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-07-09 17:18:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:29,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730091477] [2021-07-09 17:18:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:29,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730091477] [2021-07-09 17:18:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730091477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199549612] [2021-07-09 17:18:29,954 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 17:18:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199549612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:30,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:30,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932656251] [2021-07-09 17:18:30,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:30,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:30,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:30,016 INFO L87 Difference]: Start difference. First operand 125 states and 352 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 17:18:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:30,119 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-07-09 17:18:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:30,120 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:18:30,120 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:18:30,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:18:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-07-09 17:18:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-07-09 17:18:30,126 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-07-09 17:18:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:30,126 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-07-09 17:18:30,126 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 17:18:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-07-09 17:18:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:30,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:30,127 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:30,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:30,351 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-07-09 17:18:30,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:30,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781709285] [2021-07-09 17:18:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781709285] [2021-07-09 17:18:30,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781709285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281838919] [2021-07-09 17:18:30,405 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 17:18:30,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281838919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:30,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607762148] [2021-07-09 17:18:30,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:30,501 INFO L87 Difference]: Start difference. First operand 126 states and 352 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 17:18:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:30,553 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-07-09 17:18:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:30,556 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:18:30,556 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:18:30,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:18:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-07-09 17:18:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-07-09 17:18:30,562 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-07-09 17:18:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:30,562 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-07-09 17:18:30,562 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 17:18:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-07-09 17:18:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:30,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:30,564 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:30,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 17:18:30,781 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-07-09 17:18:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:30,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032189220] [2021-07-09 17:18:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:30,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032189220] [2021-07-09 17:18:30,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032189220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632888176] [2021-07-09 17:18:30,846 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 17:18:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:30,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632888176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:30,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:30,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729754360] [2021-07-09 17:18:30,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:30,919 INFO L87 Difference]: Start difference. First operand 126 states and 352 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 17:18:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:30,983 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-07-09 17:18:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:18:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:30,984 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:18:30,984 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:18:30,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:18:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-07-09 17:18:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-07-09 17:18:30,989 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-07-09 17:18:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:30,989 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-07-09 17:18:30,989 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 17:18:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-07-09 17:18:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:30,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:30,990 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:31,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:31,205 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-07-09 17:18:31,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:31,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628187046] [2021-07-09 17:18:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:31,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628187046] [2021-07-09 17:18:31,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628187046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222504622] [2021-07-09 17:18:31,258 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 17:18:31,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:31,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222504622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:31,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:31,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818577927] [2021-07-09 17:18:31,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:31,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:31,312 INFO L87 Difference]: Start difference. First operand 132 states and 368 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 17:18:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:31,420 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-07-09 17:18:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:31,421 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:18:31,422 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:18:31,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:18:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-07-09 17:18:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-07-09 17:18:31,427 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-07-09 17:18:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:31,427 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-07-09 17:18:31,427 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 17:18:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-07-09 17:18:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:31,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:31,428 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:31,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:31,641 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-07-09 17:18:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:31,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208780517] [2021-07-09 17:18:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:31,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:31,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208780517] [2021-07-09 17:18:31,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208780517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994817119] [2021-07-09 17:18:31,690 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 17:18:31,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:18:31,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:31,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994817119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:31,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849226011] [2021-07-09 17:18:31,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:31,778 INFO L87 Difference]: Start difference. First operand 139 states and 394 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 17:18:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:31,893 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-07-09 17:18:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:31,895 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:18:31,895 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:18:31,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:18:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-07-09 17:18:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 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 17:18:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-07-09 17:18:31,900 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-07-09 17:18:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:31,900 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-07-09 17:18:31,900 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 17:18:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-07-09 17:18:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:31,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:31,901 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:32,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:32,120 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-07-09 17:18:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:32,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921208711] [2021-07-09 17:18:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:32,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:32,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921208711] [2021-07-09 17:18:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921208711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:32,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238571700] [2021-07-09 17:18:32,164 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 17:18:32,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:32,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238571700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:32,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:32,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485549936] [2021-07-09 17:18:32,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:32,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:32,240 INFO L87 Difference]: Start difference. First operand 139 states and 393 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 17:18:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:32,283 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-07-09 17:18:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:32,286 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:18:32,286 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:18:32,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:18:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-07-09 17:18:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 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 17:18:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-07-09 17:18:32,291 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-07-09 17:18:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:32,291 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-07-09 17:18:32,291 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 17:18:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-07-09 17:18:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:32,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:32,292 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:32,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:32,505 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:32,506 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-07-09 17:18:32,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:32,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443611283] [2021-07-09 17:18:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:32,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:32,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443611283] [2021-07-09 17:18:32,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443611283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:32,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898494620] [2021-07-09 17:18:32,573 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 17:18:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:32,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898494620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:32,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:32,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:32,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593637675] [2021-07-09 17:18:32,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:32,650 INFO L87 Difference]: Start difference. First operand 139 states and 393 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 17:18:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:32,792 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-07-09 17:18:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:32,792 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 16 [2021-07-09 17:18:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:32,793 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:18:32,793 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:18:32,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:18:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-07-09 17:18:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-07-09 17:18:32,797 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-07-09 17:18:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:32,798 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-07-09 17:18:32,798 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 17:18:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-07-09 17:18:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:32,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:32,798 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:33,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 17:18:33,013 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-07-09 17:18:33,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:33,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926884628] [2021-07-09 17:18:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:33,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926884628] [2021-07-09 17:18:33,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926884628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001701471] [2021-07-09 17:18:33,067 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 17:18:33,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001701471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:33,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:33,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534740091] [2021-07-09 17:18:33,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:33,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:33,147 INFO L87 Difference]: Start difference. First operand 140 states and 394 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 17:18:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:33,217 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-07-09 17:18:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:33,217 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 16 [2021-07-09 17:18:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:33,219 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:18:33,219 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:18:33,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:18:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-07-09 17:18:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-07-09 17:18:33,224 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-07-09 17:18:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:33,224 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-07-09 17:18:33,224 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 17:18:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-07-09 17:18:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:33,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:33,225 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:33,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 17:18:33,439 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-07-09 17:18:33,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:33,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079424220] [2021-07-09 17:18:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079424220] [2021-07-09 17:18:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079424220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734079798] [2021-07-09 17:18:33,495 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 17:18:33,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:33,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734079798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:33,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689497326] [2021-07-09 17:18:33,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:33,582 INFO L87 Difference]: Start difference. First operand 140 states and 394 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 17:18:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:33,650 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-07-09 17:18:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:18:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:33,654 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:18:33,654 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:18:33,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:18:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-07-09 17:18:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-07-09 17:18:33,659 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-07-09 17:18:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:33,659 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-07-09 17:18:33,659 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 17:18:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-07-09 17:18:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:33,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:33,660 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:33,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:33,875 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-07-09 17:18:33,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:33,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705222713] [2021-07-09 17:18:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:33,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:33,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705222713] [2021-07-09 17:18:33,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705222713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853686648] [2021-07-09 17:18:33,919 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 17:18:33,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:33,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853686648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:33,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:33,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520410505] [2021-07-09 17:18:33,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:33,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:33,975 INFO L87 Difference]: Start difference. First operand 146 states and 412 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 17:18:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:34,079 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-07-09 17:18:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:34,081 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:18:34,081 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:18:34,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:18:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-07-09 17:18:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-07-09 17:18:34,087 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-07-09 17:18:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-07-09 17:18:34,087 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 17:18:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-07-09 17:18:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:34,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:34,088 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:34,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:18:34,301 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-07-09 17:18:34,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:34,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014962594] [2021-07-09 17:18:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:34,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014962594] [2021-07-09 17:18:34,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014962594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609415801] [2021-07-09 17:18:34,347 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 17:18:34,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:18:34,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609415801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:34,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:34,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78220717] [2021-07-09 17:18:34,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:34,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:34,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:34,400 INFO L87 Difference]: Start difference. First operand 155 states and 444 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 17:18:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:34,505 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-07-09 17:18:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:34,507 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:18:34,507 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:18:34,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:18:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-07-09 17:18:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-07-09 17:18:34,512 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-07-09 17:18:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:34,513 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-07-09 17:18:34,513 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 17:18:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-07-09 17:18:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:34,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:34,514 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:34,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:34,737 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-07-09 17:18:34,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:34,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794848825] [2021-07-09 17:18:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:34,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794848825] [2021-07-09 17:18:34,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794848825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064038667] [2021-07-09 17:18:34,787 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 17:18:34,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:34,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:34,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064038667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:34,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:34,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954785386] [2021-07-09 17:18:34,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:34,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:34,860 INFO L87 Difference]: Start difference. First operand 155 states and 443 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 17:18:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:34,899 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-07-09 17:18:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:34,901 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:18:34,901 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:18:34,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:18:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-07-09 17:18:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-07-09 17:18:34,906 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-07-09 17:18:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:34,906 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-07-09 17:18:34,907 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 17:18:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-07-09 17:18:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:34,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:34,907 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:35,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 17:18:35,132 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-07-09 17:18:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:35,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066191499] [2021-07-09 17:18:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:35,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:35,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066191499] [2021-07-09 17:18:35,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066191499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763154878] [2021-07-09 17:18:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763154878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:35,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:35,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730368005] [2021-07-09 17:18:35,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:35,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:35,243 INFO L87 Difference]: Start difference. First operand 155 states and 443 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 17:18:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:35,364 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-07-09 17:18:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:35,364 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 16 [2021-07-09 17:18:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:35,365 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:18:35,365 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:18:35,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:18:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-07-09 17:18:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-07-09 17:18:35,371 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-07-09 17:18:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:35,371 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-07-09 17:18:35,372 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 17:18:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-07-09 17:18:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:35,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:35,372 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:35,585 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-07-09 17:18:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581709975] [2021-07-09 17:18:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:35,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581709975] [2021-07-09 17:18:35,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581709975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037863093] [2021-07-09 17:18:35,627 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:35,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:35,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037863093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:35,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422917212] [2021-07-09 17:18:35,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:35,690 INFO L87 Difference]: Start difference. First operand 155 states and 442 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 17:18:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:35,762 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-07-09 17:18:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:35,763 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 16 [2021-07-09 17:18:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:35,764 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:18:35,764 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:18:35,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:18:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-07-09 17:18:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-07-09 17:18:35,769 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-07-09 17:18:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:35,769 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-07-09 17:18:35,769 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 17:18:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-07-09 17:18:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:35,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:35,770 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:35,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:35,985 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-07-09 17:18:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679790851] [2021-07-09 17:18:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:36,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:36,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679790851] [2021-07-09 17:18:36,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679790851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479795875] [2021-07-09 17:18:36,028 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 17:18:36,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:18:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:36,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479795875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:36,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-09 17:18:36,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631342988] [2021-07-09 17:18:36,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:36,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:36,156 INFO L87 Difference]: Start difference. First operand 155 states and 442 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 17:18:36,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:36,462 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-07-09 17:18:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:18:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:36,464 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:18:36,464 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:18:36,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:18:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:18:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-07-09 17:18:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-07-09 17:18:36,470 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-07-09 17:18:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-07-09 17:18:36,470 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 17:18:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-07-09 17:18:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:36,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:36,471 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:36,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:36,685 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-07-09 17:18:36,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:36,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949918933] [2021-07-09 17:18:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949918933] [2021-07-09 17:18:36,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949918933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804927783] [2021-07-09 17:18:36,739 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 17:18:36,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804927783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:36,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232672282] [2021-07-09 17:18:36,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:36,817 INFO L87 Difference]: Start difference. First operand 202 states and 567 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 17:18:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:36,919 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-07-09 17:18:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:36,920 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 16 [2021-07-09 17:18:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:36,921 INFO L225 Difference]: With dead ends: 353 [2021-07-09 17:18:36,921 INFO L226 Difference]: Without dead ends: 353 [2021-07-09 17:18:36,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-09 17:18:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-07-09 17:18:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-07-09 17:18:36,930 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-07-09 17:18:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-07-09 17:18:36,930 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 17:18:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-07-09 17:18:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:36,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:36,931 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:37,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:37,153 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-07-09 17:18:37,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:37,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377051848] [2021-07-09 17:18:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:37,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377051848] [2021-07-09 17:18:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377051848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214080853] [2021-07-09 17:18:37,199 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 17:18:37,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:18:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:37,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:37,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214080853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:37,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:37,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456193482] [2021-07-09 17:18:37,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:37,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:37,278 INFO L87 Difference]: Start difference. First operand 215 states and 612 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 17:18:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:37,372 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-07-09 17:18:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:37,374 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:18:37,374 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 17:18:37,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 17:18:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-07-09 17:18:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-09 17:18:37,383 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-09 17:18:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:37,383 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-09 17:18:37,383 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 17:18:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-09 17:18:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:37,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:37,384 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:37,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:37,597 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-07-09 17:18:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:37,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18285915] [2021-07-09 17:18:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:37,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:37,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18285915] [2021-07-09 17:18:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18285915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344229119] [2021-07-09 17:18:37,646 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 17:18:37,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:37,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:37,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344229119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:37,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:37,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:37,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607298575] [2021-07-09 17:18:37,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:37,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:37,716 INFO L87 Difference]: Start difference. First operand 239 states and 693 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 17:18:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:37,755 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-07-09 17:18:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:37,757 INFO L225 Difference]: With dead ends: 348 [2021-07-09 17:18:37,757 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:18:37,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:18:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-07-09 17:18:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-09 17:18:37,766 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-09 17:18:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:37,766 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-09 17:18:37,766 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 17:18:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-09 17:18:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:37,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:37,767 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:37,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-09 17:18:37,981 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:37,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-07-09 17:18:37,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:37,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263799241] [2021-07-09 17:18:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263799241] [2021-07-09 17:18:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263799241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194102568] [2021-07-09 17:18:38,024 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 17:18:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194102568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:38,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434938990] [2021-07-09 17:18:38,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:38,095 INFO L87 Difference]: Start difference. First operand 239 states and 693 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 17:18:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:38,167 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-07-09 17:18:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:38,168 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 16 [2021-07-09 17:18:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:38,169 INFO L225 Difference]: With dead ends: 362 [2021-07-09 17:18:38,169 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:18:38,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:18:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-07-09 17:18:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-09 17:18:38,175 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-09 17:18:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:38,176 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-09 17:18:38,176 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 17:18:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-09 17:18:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:38,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:38,176 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:38,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 17:18:38,395 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:38,395 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-07-09 17:18:38,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:38,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10824545] [2021-07-09 17:18:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:38,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10824545] [2021-07-09 17:18:38,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10824545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132131639] [2021-07-09 17:18:38,444 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 17:18:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:38,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:38,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132131639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:38,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779136778] [2021-07-09 17:18:38,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:38,528 INFO L87 Difference]: Start difference. First operand 239 states and 693 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 17:18:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:38,631 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-07-09 17:18:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:38,631 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 16 [2021-07-09 17:18:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:38,632 INFO L225 Difference]: With dead ends: 346 [2021-07-09 17:18:38,632 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:18:38,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:18:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-07-09 17:18:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-09 17:18:38,638 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-09 17:18:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:38,639 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-09 17:18:38,639 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 17:18:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-09 17:18:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:38,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:38,639 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:38,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:18:38,863 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-07-09 17:18:38,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:38,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794941836] [2021-07-09 17:18:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794941836] [2021-07-09 17:18:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794941836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374882245] [2021-07-09 17:18:38,905 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 17:18:38,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374882245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:38,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018375665] [2021-07-09 17:18:38,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:38,983 INFO L87 Difference]: Start difference. First operand 239 states and 693 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 17:18:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:39,123 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-07-09 17:18:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:39,123 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 16 [2021-07-09 17:18:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:39,124 INFO L225 Difference]: With dead ends: 402 [2021-07-09 17:18:39,124 INFO L226 Difference]: Without dead ends: 402 [2021-07-09 17:18:39,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-09 17:18:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-07-09 17:18:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-07-09 17:18:39,131 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-07-09 17:18:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:39,131 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-07-09 17:18:39,131 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 17:18:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-07-09 17:18:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:39,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:39,132 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:39,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-09 17:18:39,349 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-07-09 17:18:39,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:39,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129471551] [2021-07-09 17:18:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:39,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:39,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129471551] [2021-07-09 17:18:39,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129471551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229692936] [2021-07-09 17:18:39,398 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 17:18:39,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:39,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:39,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:39,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229692936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:39,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:39,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760746340] [2021-07-09 17:18:39,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:39,458 INFO L87 Difference]: Start difference. First operand 254 states and 742 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 17:18:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:39,553 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-07-09 17:18:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:39,555 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:18:39,555 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:18:39,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:18:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-07-09 17:18:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-07-09 17:18:39,563 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-07-09 17:18:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:39,563 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-07-09 17:18:39,563 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 17:18:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-07-09 17:18:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:39,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:39,564 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:39,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:39,777 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-07-09 17:18:39,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:39,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074028040] [2021-07-09 17:18:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:39,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:39,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074028040] [2021-07-09 17:18:39,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074028040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263417982] [2021-07-09 17:18:39,822 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 17:18:39,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:39,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263417982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:39,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789084161] [2021-07-09 17:18:39,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:39,882 INFO L87 Difference]: Start difference. First operand 292 states and 868 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 17:18:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:39,940 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-07-09 17:18:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:18:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:39,942 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:18:39,942 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:18:39,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:18:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-07-09 17:18:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-07-09 17:18:39,950 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-07-09 17:18:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:39,950 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-07-09 17:18:39,950 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 17:18:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-07-09 17:18:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:39,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:39,951 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:40,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 17:18:40,173 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-07-09 17:18:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:40,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282627099] [2021-07-09 17:18:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:40,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282627099] [2021-07-09 17:18:40,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282627099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553478629] [2021-07-09 17:18:40,212 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 17:18:40,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553478629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:40,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:40,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69892727] [2021-07-09 17:18:40,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:40,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:40,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:40,285 INFO L87 Difference]: Start difference. First operand 290 states and 860 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 17:18:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:40,347 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-07-09 17:18:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:40,347 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 16 [2021-07-09 17:18:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:40,349 INFO L225 Difference]: With dead ends: 402 [2021-07-09 17:18:40,349 INFO L226 Difference]: Without dead ends: 402 [2021-07-09 17:18:40,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-09 17:18:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-07-09 17:18:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-09 17:18:40,355 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-09 17:18:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:40,355 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-09 17:18:40,355 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 17:18:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-09 17:18:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:40,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:40,356 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:40,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-09 17:18:40,579 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-07-09 17:18:40,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:40,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420197534] [2021-07-09 17:18:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:40,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420197534] [2021-07-09 17:18:40,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420197534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597201739] [2021-07-09 17:18:40,618 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 17:18:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:40,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597201739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:40,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800637026] [2021-07-09 17:18:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:40,682 INFO L87 Difference]: Start difference. First operand 286 states and 846 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 17:18:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:40,756 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-07-09 17:18:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:40,757 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 16 [2021-07-09 17:18:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:40,758 INFO L225 Difference]: With dead ends: 379 [2021-07-09 17:18:40,758 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:18:40,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:18:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-07-09 17:18:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-09 17:18:40,765 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-09 17:18:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:40,765 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-09 17:18:40,765 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 17:18:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-09 17:18:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:40,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:40,766 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:40,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:40,989 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-07-09 17:18:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:40,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819819646] [2021-07-09 17:18:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:41,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819819646] [2021-07-09 17:18:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819819646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337147477] [2021-07-09 17:18:41,030 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 17:18:41,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:41,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337147477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:41,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:41,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418321554] [2021-07-09 17:18:41,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:41,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:41,091 INFO L87 Difference]: Start difference. First operand 286 states and 846 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 17:18:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:41,195 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-07-09 17:18:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:18:41,196 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 16 [2021-07-09 17:18:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:41,197 INFO L225 Difference]: With dead ends: 381 [2021-07-09 17:18:41,197 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:18:41,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:18:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-07-09 17:18:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-09 17:18:41,203 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-09 17:18:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:41,204 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-09 17:18:41,204 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 17:18:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-09 17:18:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:41,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:41,205 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:41,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:41,425 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-07-09 17:18:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:41,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227838791] [2021-07-09 17:18:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:41,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227838791] [2021-07-09 17:18:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227838791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669312028] [2021-07-09 17:18:41,465 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 17:18:41,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669312028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:41,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:18:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339131037] [2021-07-09 17:18:41,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:41,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:41,539 INFO L87 Difference]: Start difference. First operand 286 states and 846 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 17:18:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:41,681 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-07-09 17:18:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:18:41,682 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 16 [2021-07-09 17:18:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:41,683 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:18:41,683 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:18:41,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:18:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-07-09 17:18:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-09 17:18:41,691 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-07-09 17:18:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:41,691 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-09 17:18:41,691 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 17:18:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-09 17:18:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:41,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:41,692 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:41,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:41,905 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-07-09 17:18:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:41,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41217002] [2021-07-09 17:18:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:41,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41217002] [2021-07-09 17:18:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41217002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189901197] [2021-07-09 17:18:41,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:41,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:41,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:42,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189901197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:42,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-09 17:18:42,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799954615] [2021-07-09 17:18:42,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:42,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:42,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:42,031 INFO L87 Difference]: Start difference. First operand 297 states and 879 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 17:18:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:42,136 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-07-09 17:18:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:42,136 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 16 [2021-07-09 17:18:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:42,138 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:18:42,138 INFO L226 Difference]: Without dead ends: 444 [2021-07-09 17:18:42,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-09 17:18:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-07-09 17:18:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-07-09 17:18:42,149 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-07-09 17:18:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:42,149 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-07-09 17:18:42,149 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 17:18:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-07-09 17:18:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:42,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:42,150 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:42,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:42,370 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-07-09 17:18:42,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:42,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81481191] [2021-07-09 17:18:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:42,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81481191] [2021-07-09 17:18:42,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81481191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141257263] [2021-07-09 17:18:42,427 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 17:18:42,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:42,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:42,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141257263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:42,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-09 17:18:42,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901907948] [2021-07-09 17:18:42,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:42,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:42,494 INFO L87 Difference]: Start difference. First operand 344 states and 1030 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 17:18:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:42,567 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-07-09 17:18:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:18:42,567 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 16 [2021-07-09 17:18:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:42,569 INFO L225 Difference]: With dead ends: 432 [2021-07-09 17:18:42,569 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 17:18:42,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 17:18:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-07-09 17:18:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-07-09 17:18:42,576 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-07-09 17:18:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-07-09 17:18:42,576 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 17:18:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-07-09 17:18:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:42,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:42,577 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:42,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:42,800 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-07-09 17:18:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:42,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791065053] [2021-07-09 17:18:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:42,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791065053] [2021-07-09 17:18:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791065053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25398757] [2021-07-09 17:18:42,852 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 17:18:42,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25398757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:42,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:18:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251639010] [2021-07-09 17:18:42,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:42,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:42,929 INFO L87 Difference]: Start difference. First operand 342 states and 1018 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 17:18:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:43,039 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-07-09 17:18:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:43,040 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 16 [2021-07-09 17:18:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:43,041 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:18:43,041 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:18:43,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:18:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-07-09 17:18:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-07-09 17:18:43,047 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-07-09 17:18:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:43,047 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-07-09 17:18:43,047 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 17:18:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-07-09 17:18:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:43,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:43,048 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:43,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 17:18:43,253 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-07-09 17:18:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:43,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877339083] [2021-07-09 17:18:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:43,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877339083] [2021-07-09 17:18:43,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877339083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518820938] [2021-07-09 17:18:43,303 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 17:18:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518820938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:43,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:18:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742611571] [2021-07-09 17:18:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:43,389 INFO L87 Difference]: Start difference. First operand 338 states and 1004 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 17:18:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:43,557 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-07-09 17:18:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:43,557 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 16 [2021-07-09 17:18:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:43,559 INFO L225 Difference]: With dead ends: 417 [2021-07-09 17:18:43,559 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 17:18:43,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:43,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 17:18:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-07-09 17:18:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-07-09 17:18:43,566 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-07-09 17:18:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:43,566 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-07-09 17:18:43,566 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 17:18:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-07-09 17:18:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:43,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:43,567 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:43,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 17:18:43,781 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-07-09 17:18:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:43,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128503883] [2021-07-09 17:18:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:43,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128503883] [2021-07-09 17:18:43,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128503883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865140863] [2021-07-09 17:18:43,834 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 17:18:43,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:43,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865140863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:43,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:18:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259845562] [2021-07-09 17:18:43,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:43,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:43,913 INFO L87 Difference]: Start difference. First operand 332 states and 984 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 17:18:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:44,069 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-07-09 17:18:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:44,070 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 16 [2021-07-09 17:18:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:44,071 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:18:44,071 INFO L226 Difference]: Without dead ends: 404 [2021-07-09 17:18:44,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-09 17:18:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-07-09 17:18:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-07-09 17:18:44,078 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-07-09 17:18:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:44,078 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-07-09 17:18:44,078 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 17:18:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-07-09 17:18:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:44,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:44,079 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:44,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:44,293 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-07-09 17:18:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848587873] [2021-07-09 17:18:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:44,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:44,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848587873] [2021-07-09 17:18:44,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848587873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:44,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150341804] [2021-07-09 17:18:44,345 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 17:18:44,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:18:44,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:44,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150341804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:44,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:44,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:18:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469482785] [2021-07-09 17:18:44,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:44,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:44,420 INFO L87 Difference]: Start difference. First operand 325 states and 962 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 17:18:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:44,543 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-07-09 17:18:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:44,544 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 16 [2021-07-09 17:18:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:44,545 INFO L225 Difference]: With dead ends: 408 [2021-07-09 17:18:44,545 INFO L226 Difference]: Without dead ends: 408 [2021-07-09 17:18:44,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-09 17:18:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-07-09 17:18:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-07-09 17:18:44,558 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-07-09 17:18:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:44,558 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-07-09 17:18:44,559 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 17:18:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-07-09 17:18:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:18:44,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:44,560 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:44,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-09 17:18:44,773 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-07-09 17:18:44,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:44,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115070539] [2021-07-09 17:18:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:44,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115070539] [2021-07-09 17:18:44,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115070539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:44,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668086823] [2021-07-09 17:18:44,829 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 17:18:44,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:44,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668086823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:44,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:44,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:18:44,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220592103] [2021-07-09 17:18:44,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:44,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:44,919 INFO L87 Difference]: Start difference. First operand 320 states and 946 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 17:18:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:45,121 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-07-09 17:18:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:18:45,122 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 16 [2021-07-09 17:18:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:45,123 INFO L225 Difference]: With dead ends: 465 [2021-07-09 17:18:45,123 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:18:45,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:18:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:18:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-07-09 17:18:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-07-09 17:18:45,129 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-07-09 17:18:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:45,129 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-07-09 17:18:45,129 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 17:18:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-07-09 17:18:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:45,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:45,130 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:45,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:45,345 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-07-09 17:18:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991751787] [2021-07-09 17:18:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:45,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:45,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991751787] [2021-07-09 17:18:45,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991751787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767081070] [2021-07-09 17:18:45,386 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 17:18:45,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767081070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:45,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-09 17:18:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127150636] [2021-07-09 17:18:45,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:45,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:45,448 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:45,515 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-07-09 17:18:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:18:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 17:18:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:45,517 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:18:45,517 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:18:45,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:18:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-07-09 17:18:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-07-09 17:18:45,523 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-07-09 17:18:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:45,523 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-07-09 17:18:45,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-07-09 17:18:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:45,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:45,525 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:45,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:45,741 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-07-09 17:18:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:45,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420148999] [2021-07-09 17:18:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:45,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:45,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420148999] [2021-07-09 17:18:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420148999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651958898] [2021-07-09 17:18:45,788 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 17:18:45,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651958898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:45,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 17:18:45,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141550742] [2021-07-09 17:18:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:45,852 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:45,954 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-07-09 17:18:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:18:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:45,956 INFO L225 Difference]: With dead ends: 409 [2021-07-09 17:18:45,956 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:18:45,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:18:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-07-09 17:18:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-07-09 17:18:45,963 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-07-09 17:18:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:45,963 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-07-09 17:18:45,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-07-09 17:18:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:45,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:45,964 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:46,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:46,185 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-07-09 17:18:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503825741] [2021-07-09 17:18:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:46,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503825741] [2021-07-09 17:18:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503825741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395473405] [2021-07-09 17:18:46,237 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 17:18:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:46,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395473405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:46,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:46,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040362762] [2021-07-09 17:18:46,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:46,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:46,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:46,303 INFO L87 Difference]: Start difference. First operand 323 states and 963 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 17:18:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:46,416 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-07-09 17:18:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:46,417 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 17 [2021-07-09 17:18:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:46,418 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:18:46,418 INFO L226 Difference]: Without dead ends: 411 [2021-07-09 17:18:46,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-09 17:18:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-07-09 17:18:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-07-09 17:18:46,426 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-07-09 17:18:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:46,426 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-07-09 17:18:46,426 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 17:18:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-07-09 17:18:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:46,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:46,427 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:46,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:46,627 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-07-09 17:18:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:46,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438244944] [2021-07-09 17:18:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:46,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:46,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438244944] [2021-07-09 17:18:46,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438244944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510506183] [2021-07-09 17:18:46,673 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 17:18:46,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:46,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:46,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510506183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:46,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:46,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374684887] [2021-07-09 17:18:46,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:46,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:46,728 INFO L87 Difference]: Start difference. First operand 323 states and 962 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 17:18:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:46,800 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-07-09 17:18:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:18:46,800 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 17 [2021-07-09 17:18:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:46,801 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:18:46,801 INFO L226 Difference]: Without dead ends: 364 [2021-07-09 17:18:46,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-09 17:18:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-07-09 17:18:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-07-09 17:18:46,806 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-07-09 17:18:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:46,807 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-07-09 17:18:46,807 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 17:18:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-07-09 17:18:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:46,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:46,808 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:47,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:47,021 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-07-09 17:18:47,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:47,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189978338] [2021-07-09 17:18:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189978338] [2021-07-09 17:18:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189978338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665361474] [2021-07-09 17:18:47,082 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 17:18:47,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:18:47,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665361474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:47,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:18:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525048846] [2021-07-09 17:18:47,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:47,154 INFO L87 Difference]: Start difference. First operand 323 states and 961 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 17:18:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:47,247 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-07-09 17:18:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:47,247 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 17 [2021-07-09 17:18:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:47,249 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:18:47,249 INFO L226 Difference]: Without dead ends: 351 [2021-07-09 17:18:47,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-09 17:18:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-07-09 17:18:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-07-09 17:18:47,255 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-07-09 17:18:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:47,255 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-07-09 17:18:47,255 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 17:18:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-07-09 17:18:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:47,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:47,256 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:47,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:47,468 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-07-09 17:18:47,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:47,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161195542] [2021-07-09 17:18:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161195542] [2021-07-09 17:18:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161195542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921534207] [2021-07-09 17:18:47,513 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 17:18:47,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:47,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921534207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:47,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:18:47,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069837434] [2021-07-09 17:18:47,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:18:47,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:18:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:18:47,591 INFO L87 Difference]: Start difference. First operand 323 states and 960 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 17:18:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:47,642 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-07-09 17:18:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:47,643 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 17 [2021-07-09 17:18:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:47,644 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:18:47,645 INFO L226 Difference]: Without dead ends: 443 [2021-07-09 17:18:47,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-09 17:18:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-07-09 17:18:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-07-09 17:18:47,651 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-07-09 17:18:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:47,651 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-07-09 17:18:47,651 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 17:18:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-07-09 17:18:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:47,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:47,652 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:47,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 17:18:47,869 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-07-09 17:18:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:47,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059790340] [2021-07-09 17:18:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059790340] [2021-07-09 17:18:47,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059790340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802697180] [2021-07-09 17:18:47,919 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 17:18:47,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802697180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:47,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-09 17:18:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477408314] [2021-07-09 17:18:47,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:47,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:47,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:47,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:47,988 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:48,040 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-07-09 17:18:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:18:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:18:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:48,042 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:18:48,042 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:18:48,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:18:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-07-09 17:18:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-07-09 17:18:48,048 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-07-09 17:18:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:48,049 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-07-09 17:18:48,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-07-09 17:18:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:48,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:48,049 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:48,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 17:18:48,258 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-07-09 17:18:48,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:48,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452141400] [2021-07-09 17:18:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:48,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:48,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452141400] [2021-07-09 17:18:48,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452141400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969735035] [2021-07-09 17:18:48,306 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 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 17:18:48,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:48,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969735035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:48,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 17:18:48,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847383867] [2021-07-09 17:18:48,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:18:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:18:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:18:48,363 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:48,460 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-07-09 17:18:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:18:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:48,463 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:18:48,463 INFO L226 Difference]: Without dead ends: 426 [2021-07-09 17:18:48,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-09 17:18:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-07-09 17:18:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-07-09 17:18:48,490 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-07-09 17:18:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:48,490 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-07-09 17:18:48,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-07-09 17:18:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:48,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:48,492 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:48,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 17:18:48,713 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-07-09 17:18:48,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:48,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901740842] [2021-07-09 17:18:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:48,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901740842] [2021-07-09 17:18:48,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901740842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824031703] [2021-07-09 17:18:48,768 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 17:18:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824031703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:48,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988766576] [2021-07-09 17:18:48,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:48,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:48,865 INFO L87 Difference]: Start difference. First operand 329 states and 979 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 17:18:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:49,027 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-07-09 17:18:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:49,027 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 17 [2021-07-09 17:18:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:49,029 INFO L225 Difference]: With dead ends: 433 [2021-07-09 17:18:49,029 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:18:49,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:18:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-07-09 17:18:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-07-09 17:18:49,039 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-07-09 17:18:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:49,039 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-07-09 17:18:49,040 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 17:18:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-07-09 17:18:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:49,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:49,040 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:49,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 17:18:49,257 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-07-09 17:18:49,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:49,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879786177] [2021-07-09 17:18:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:49,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:49,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879786177] [2021-07-09 17:18:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879786177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376363686] [2021-07-09 17:18:49,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:49,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:49,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376363686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:49,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:49,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952268295] [2021-07-09 17:18:49,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:49,380 INFO L87 Difference]: Start difference. First operand 329 states and 978 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 17:18:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:49,457 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-07-09 17:18:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:49,457 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 17 [2021-07-09 17:18:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:49,458 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:18:49,458 INFO L226 Difference]: Without dead ends: 383 [2021-07-09 17:18:49,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-09 17:18:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-07-09 17:18:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-07-09 17:18:49,464 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-07-09 17:18:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:49,464 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-07-09 17:18:49,464 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 17:18:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-07-09 17:18:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:49,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:49,465 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:49,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:49,673 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-07-09 17:18:49,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:49,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382547505] [2021-07-09 17:18:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:49,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:49,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382547505] [2021-07-09 17:18:49,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382547505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950808988] [2021-07-09 17:18:49,740 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 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 17:18:49,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:49,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:49,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950808988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:49,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:49,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:18:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359907284] [2021-07-09 17:18:49,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:49,800 INFO L87 Difference]: Start difference. First operand 329 states and 977 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 17:18:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:49,872 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-07-09 17:18:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:18:49,872 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 17 [2021-07-09 17:18:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:49,874 INFO L225 Difference]: With dead ends: 385 [2021-07-09 17:18:49,874 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:18:49,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:18:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-07-09 17:18:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-07-09 17:18:49,880 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-07-09 17:18:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:49,880 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-07-09 17:18:49,880 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 17:18:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-07-09 17:18:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:49,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:49,881 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:50,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-07-09 17:18:50,103 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-07-09 17:18:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:50,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447734809] [2021-07-09 17:18:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:50,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:50,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447734809] [2021-07-09 17:18:50,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447734809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149949295] [2021-07-09 17:18:50,173 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 17:18:50,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:50,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149949295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782777937] [2021-07-09 17:18:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:50,243 INFO L87 Difference]: Start difference. First operand 329 states and 976 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 17:18:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:50,332 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-07-09 17:18:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:50,333 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 17 [2021-07-09 17:18:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:50,334 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:18:50,334 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:18:50,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:18:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-07-09 17:18:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-07-09 17:18:50,340 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-07-09 17:18:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:50,340 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-07-09 17:18:50,340 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 17:18:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-07-09 17:18:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:50,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:50,341 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:50,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:50,566 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-07-09 17:18:50,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:50,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491842179] [2021-07-09 17:18:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:50,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:50,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491842179] [2021-07-09 17:18:50,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491842179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101599178] [2021-07-09 17:18:50,626 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 17:18:50,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:18:50,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:50,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101599178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:50,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-07-09 17:18:50,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687674616] [2021-07-09 17:18:50,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:50,686 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 17:18:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:50,747 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-07-09 17:18:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 17 [2021-07-09 17:18:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:50,749 INFO L225 Difference]: With dead ends: 518 [2021-07-09 17:18:50,765 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 17:18:50,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 17:18:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-07-09 17:18:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-07-09 17:18:50,771 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-07-09 17:18:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:50,771 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-07-09 17:18:50,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 17:18:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-07-09 17:18:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:50,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:50,772 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:50,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 17:18:50,972 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-07-09 17:18:50,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:50,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574337675] [2021-07-09 17:18:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:51,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:51,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574337675] [2021-07-09 17:18:51,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574337675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658147259] [2021-07-09 17:18:51,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:51,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:18:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:51,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658147259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:51,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:18:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234614879] [2021-07-09 17:18:51,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:51,107 INFO L87 Difference]: Start difference. First operand 384 states and 1187 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 17:18:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:51,207 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-07-09 17:18:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:51,207 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 17 [2021-07-09 17:18:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:51,209 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:18:51,209 INFO L226 Difference]: Without dead ends: 494 [2021-07-09 17:18:51,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-09 17:18:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-07-09 17:18:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-07-09 17:18:51,217 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-07-09 17:18:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:51,217 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-07-09 17:18:51,217 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 17:18:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-07-09 17:18:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:51,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:51,218 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:51,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:51,419 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-07-09 17:18:51,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:51,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787527830] [2021-07-09 17:18:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:51,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:51,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787527830] [2021-07-09 17:18:51,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787527830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113049158] [2021-07-09 17:18:51,468 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 17:18:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:51,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113049158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:51,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 17:18:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320185157] [2021-07-09 17:18:51,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:51,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:51,543 INFO L87 Difference]: Start difference. First operand 384 states and 1185 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 17:18:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:51,663 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-07-09 17:18:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:51,663 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 17 [2021-07-09 17:18:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:51,665 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:18:51,665 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:18:51,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:18:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-07-09 17:18:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-07-09 17:18:51,673 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-07-09 17:18:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:51,673 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-07-09 17:18:51,674 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 17:18:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-07-09 17:18:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:51,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:51,674 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:51,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:51,889 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-07-09 17:18:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:51,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087577108] [2021-07-09 17:18:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:51,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:51,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087577108] [2021-07-09 17:18:51,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087577108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204486021] [2021-07-09 17:18:51,947 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 17:18:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:52,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204486021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:52,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 17:18:52,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991569197] [2021-07-09 17:18:52,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:52,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:52,028 INFO L87 Difference]: Start difference. First operand 390 states and 1207 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 17:18:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:52,135 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-07-09 17:18:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:52,135 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 17 [2021-07-09 17:18:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:52,136 INFO L225 Difference]: With dead ends: 453 [2021-07-09 17:18:52,136 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 17:18:52,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 17:18:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-07-09 17:18:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-07-09 17:18:52,143 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-07-09 17:18:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:52,144 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-07-09 17:18:52,144 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 17:18:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-07-09 17:18:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:52,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:52,145 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:52,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:52,367 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-07-09 17:18:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:52,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760037470] [2021-07-09 17:18:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:52,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760037470] [2021-07-09 17:18:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760037470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413401215] [2021-07-09 17:18:52,418 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 17:18:52,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:18:52,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:18:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:52,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413401215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:52,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:18:52,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415059149] [2021-07-09 17:18:52,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:52,493 INFO L87 Difference]: Start difference. First operand 390 states and 1206 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 17:18:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:52,582 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-07-09 17:18:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:52,582 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 17 [2021-07-09 17:18:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:52,583 INFO L225 Difference]: With dead ends: 450 [2021-07-09 17:18:52,583 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:18:52,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:18:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-07-09 17:18:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-07-09 17:18:52,588 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-07-09 17:18:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:52,589 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-07-09 17:18:52,589 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 17:18:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-07-09 17:18:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:52,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:52,589 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:52,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-09 17:18:52,790 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-07-09 17:18:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:52,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27312281] [2021-07-09 17:18:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:52,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27312281] [2021-07-09 17:18:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27312281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135831772] [2021-07-09 17:18:52,841 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 17:18:52,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:52,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:52,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:52,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:52,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135831772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:52,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:52,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 17:18:52,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507945985] [2021-07-09 17:18:52,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:52,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:52,906 INFO L87 Difference]: Start difference. First operand 390 states and 1205 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 17:18:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:53,007 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-07-09 17:18:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:18:53,007 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 17 [2021-07-09 17:18:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:53,008 INFO L225 Difference]: With dead ends: 444 [2021-07-09 17:18:53,008 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:18:53,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:18:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-07-09 17:18:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-07-09 17:18:53,014 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-07-09 17:18:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:53,014 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-07-09 17:18:53,014 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 17:18:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-07-09 17:18:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:18:53,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:53,015 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:53,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:18:53,215 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-07-09 17:18:53,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:53,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137081589] [2021-07-09 17:18:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:53,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137081589] [2021-07-09 17:18:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137081589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140951016] [2021-07-09 17:18:53,285 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 17:18:53,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:18:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:18:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:53,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140951016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:53,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 17:18:53,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967187018] [2021-07-09 17:18:53,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:53,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:53,359 INFO L87 Difference]: Start difference. First operand 390 states and 1204 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 17:18:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:53,445 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-07-09 17:18:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:53,446 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 17 [2021-07-09 17:18:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:53,447 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:18:53,447 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 17:18:53,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 17:18:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-07-09 17:18:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-07-09 17:18:53,452 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-07-09 17:18:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:53,452 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-07-09 17:18:53,452 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 17:18:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-07-09 17:18:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:18:53,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:53,452 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:53,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 17:18:53,653 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-07-09 17:18:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:53,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918863034] [2021-07-09 17:18:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:53,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:53,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918863034] [2021-07-09 17:18:53,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918863034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578444948] [2021-07-09 17:18:53,747 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 17:18:53,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:18:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:18:53,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:53,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578444948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:53,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:18:53,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194177390] [2021-07-09 17:18:53,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:53,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:53,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:53,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:53,848 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 17:18:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:53,934 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-07-09 17:18:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:18:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 17:18:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:53,936 INFO L225 Difference]: With dead ends: 721 [2021-07-09 17:18:53,936 INFO L226 Difference]: Without dead ends: 721 [2021-07-09 17:18:53,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-09 17:18:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-07-09 17:18:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-07-09 17:18:53,943 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-07-09 17:18:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:53,944 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-07-09 17:18:53,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 17:18:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-07-09 17:18:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:18:53,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:53,944 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:54,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 17:18:54,145 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-07-09 17:18:54,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:54,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908570702] [2021-07-09 17:18:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:54,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908570702] [2021-07-09 17:18:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908570702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005415974] [2021-07-09 17:18:54,255 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 17:18:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:18:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:54,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005415974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:54,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:54,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:18:54,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581341171] [2021-07-09 17:18:54,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:54,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:54,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:54,388 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 17:18:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:54,504 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-07-09 17:18:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:18:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 19 [2021-07-09 17:18:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:54,506 INFO L225 Difference]: With dead ends: 819 [2021-07-09 17:18:54,506 INFO L226 Difference]: Without dead ends: 819 [2021-07-09 17:18:54,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-07-09 17:18:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-07-09 17:18:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-07-09 17:18:54,517 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-07-09 17:18:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:54,517 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-07-09 17:18:54,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 17:18:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-07-09 17:18:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:18:54,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:54,519 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:54,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-07-09 17:18:54,733 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-07-09 17:18:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:54,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494147831] [2021-07-09 17:18:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:54,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494147831] [2021-07-09 17:18:54,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494147831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523478131] [2021-07-09 17:18:54,891 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 17:18:54,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:18:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:55,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523478131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:55,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:55,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:18:55,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407176116] [2021-07-09 17:18:55,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:18:55,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:55,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:18:55,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:55,054 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 17:18:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:55,235 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-07-09 17:18:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:55,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 17:18:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:55,237 INFO L225 Difference]: With dead ends: 928 [2021-07-09 17:18:55,237 INFO L226 Difference]: Without dead ends: 927 [2021-07-09 17:18:55,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-09 17:18:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-07-09 17:18:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-07-09 17:18:55,250 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-07-09 17:18:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:55,250 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-07-09 17:18:55,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 17:18:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-07-09 17:18:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:18:55,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:55,251 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:55,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:55,466 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-07-09 17:18:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:55,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908992298] [2021-07-09 17:18:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:55,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908992298] [2021-07-09 17:18:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908992298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093751277] [2021-07-09 17:18:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:55,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:18:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:55,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:56,017 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:18:56,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:18:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:18:56,757 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 198 [2021-07-09 17:18:57,499 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 262 [2021-07-09 17:18:57,631 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-07-09 17:18:57,888 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-07-09 17:18:58,194 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-07-09 17:18:59,593 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 238 [2021-07-09 17:18:59,802 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-07-09 17:19:00,339 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-07-09 17:19:00,878 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-07-09 17:19:01,511 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-07-09 17:19:02,540 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-07-09 17:19:03,006 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-07-09 17:19:03,773 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-07-09 17:19:03,952 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-07-09 17:19:04,155 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-07-09 17:19:04,308 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-07-09 17:19:05,339 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-07-09 17:19:05,511 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-07-09 17:19:05,753 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-07-09 17:19:06,650 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-07-09 17:19:07,091 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-07-09 17:19:07,686 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-07-09 17:19:07,918 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-07-09 17:19:08,089 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-07-09 17:19:08,291 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-07-09 17:19:09,163 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-07-09 17:19:09,348 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-07-09 17:19:09,948 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 180 [2021-07-09 17:19:10,832 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-07-09 17:19:11,297 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-07-09 17:19:11,947 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-07-09 17:19:13,290 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-07-09 17:19:13,439 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-07-09 17:19:13,567 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-07-09 17:19:14,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 237 [2021-07-09 17:19:14,934 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-07-09 17:19:15,110 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-07-09 17:19:15,416 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-07-09 17:19:16,328 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-07-09 17:19:17,719 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-07-09 17:19:17,981 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-07-09 17:19:18,474 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-07-09 17:19:19,278 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-07-09 17:19:20,292 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-07-09 17:19:22,553 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-07-09 17:19:22,673 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-07-09 17:19:22,896 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-07-09 17:19:23,058 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-07-09 17:19:24,674 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-07-09 17:19:24,927 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-07-09 17:19:25,304 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-07-09 17:19:25,782 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-07-09 17:19:26,337 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-07-09 17:19:26,554 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-07-09 17:19:28,308 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-07-09 17:19:28,520 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-07-09 17:19:28,860 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-07-09 17:19:29,347 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-07-09 17:19:29,949 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-07-09 17:19:31,182 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-07-09 17:19:32,456 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-07-09 17:19:32,611 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-07-09 17:19:32,832 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-07-09 17:19:33,118 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-07-09 17:19:33,833 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 256 [2021-07-09 17:19:34,298 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-07-09 17:19:35,036 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-07-09 17:19:35,199 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-07-09 17:19:35,552 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-07-09 17:19:35,988 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-07-09 17:19:36,527 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-07-09 17:19:37,544 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-07-09 17:19:38,934 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-07-09 17:19:41,333 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-07-09 17:19:46,271 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-07-09 17:19:52,087 WARN L205 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-07-09 17:19:58,831 WARN L205 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-07-09 17:20:06,787 WARN L205 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-07-09 17:20:16,082 WARN L205 SmtUtils]: Spent 9.28 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-07-09 17:20:24,974 WARN L205 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-07-09 17:20:25,295 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-07-09 17:20:33,117 WARN L205 SmtUtils]: Spent 7.81 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-07-09 17:20:37,272 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-07-09 17:20:41,004 WARN L205 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-07-09 17:20:41,127 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 1251 [2021-07-09 17:20:41,232 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1123 [2021-07-09 17:20:41,430 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-07-09 17:20:42,224 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-07-09 17:20:42,812 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-07-09 17:20:43,709 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-07-09 17:20:44,430 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-07-09 17:20:45,359 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-07-09 17:20:46,443 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-07-09 17:20:47,871 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-07-09 17:20:48,752 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-07-09 17:20:49,419 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-07-09 17:20:50,093 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 209 [2021-07-09 17:20:50,712 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 210 [2021-07-09 17:20:51,002 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-07-09 17:20:51,383 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-07-09 17:20:51,916 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-07-09 17:20:52,509 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-07-09 17:20:53,128 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-07-09 17:20:54,894 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-07-09 17:20:56,763 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-07-09 17:20:57,611 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-07-09 17:20:58,765 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-07-09 17:20:58,952 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-07-09 17:20:59,260 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-07-09 17:21:00,226 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-07-09 17:21:00,435 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-07-09 17:21:00,722 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-07-09 17:21:01,206 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-07-09 17:21:01,723 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-07-09 17:21:01,835 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-07-09 17:21:02,087 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 542 [2021-07-09 17:21:02,419 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-07-09 17:21:03,005 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 218 [2021-07-09 17:21:03,550 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-07-09 17:21:04,671 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-07-09 17:21:05,106 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-07-09 17:21:05,627 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-07-09 17:21:06,174 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-07-09 17:21:07,064 WARN L205 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-07-09 17:21:09,815 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-07-09 17:21:12,840 WARN L205 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-07-09 17:21:13,039 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-07-09 17:21:13,432 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-07-09 17:21:14,823 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-07-09 17:21:15,416 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-07-09 17:21:15,952 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-07-09 17:21:16,209 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-07-09 17:21:16,787 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-07-09 17:21:16,968 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-07-09 17:21:17,445 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-07-09 17:21:18,212 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-07-09 17:21:18,488 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-07-09 17:21:19,152 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-07-09 17:21:20,149 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-07-09 17:21:21,085 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-07-09 17:21:22,270 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-07-09 17:21:22,637 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-07-09 17:21:23,171 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-07-09 17:21:23,831 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-07-09 17:21:24,052 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-07-09 17:21:24,384 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-07-09 17:21:24,656 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-07-09 17:21:24,979 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-07-09 17:21:25,235 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-07-09 17:21:26,203 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-07-09 17:21:26,559 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-07-09 17:21:27,802 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-07-09 17:21:28,058 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-07-09 17:21:28,498 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-07-09 17:21:30,169 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-07-09 17:21:34,862 WARN L205 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-07-09 17:21:39,558 WARN L205 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-07-09 17:21:46,242 WARN L205 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-07-09 17:21:46,824 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-07-09 17:21:47,672 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-07-09 17:21:49,979 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-07-09 17:21:50,453 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-07-09 17:21:51,407 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-07-09 17:21:51,673 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-07-09 17:21:52,438 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-07-09 17:21:53,392 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-07-09 17:21:54,347 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-07-09 17:21:55,397 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-07-09 17:21:56,071 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-07-09 17:21:57,318 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-07-09 17:21:57,496 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-07-09 17:21:57,682 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-07-09 17:21:57,902 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-07-09 17:21:58,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:21:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093751277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:21:58,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375872606] [2021-07-09 17:21:58,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:21:58,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:21:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:21:58,318 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,620 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-07-09 17:21:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:21:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 17:21:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,623 INFO L225 Difference]: With dead ends: 848 [2021-07-09 17:21:58,623 INFO L226 Difference]: Without dead ends: 845 [2021-07-09 17:21:58,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:21:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-07-09 17:21:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-07-09 17:21:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-07-09 17:21:58,633 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-07-09 17:21:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,633 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-07-09 17:21:58,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-07-09 17:21:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:21:58,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,634 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 17:21:58,836 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-07-09 17:21:58,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122646314] [2021-07-09 17:21:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:58,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122646314] [2021-07-09 17:21:58,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122646314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050268002] [2021-07-09 17:21:58,919 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 17:21:58,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:59,375 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:21:59,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:22:00,497 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-07-09 17:22:00,736 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-07-09 17:22:01,318 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 242 [2021-07-09 17:22:01,433 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 248 [2021-07-09 17:22:01,847 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-07-09 17:22:02,356 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-07-09 17:22:02,961 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-07-09 17:22:03,568 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-07-09 17:22:04,303 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-07-09 17:22:05,060 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-07-09 17:22:05,568 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-07-09 17:22:06,078 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-07-09 17:22:06,281 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-07-09 17:22:07,315 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-07-09 17:22:07,979 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-07-09 17:22:08,232 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-07-09 17:22:08,526 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-07-09 17:22:08,948 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-07-09 17:22:09,376 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-07-09 17:22:09,981 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-07-09 17:22:10,534 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-07-09 17:22:10,873 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-07-09 17:22:10,994 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-07-09 17:22:11,514 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-07-09 17:22:11,889 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-07-09 17:22:12,519 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-07-09 17:22:12,719 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-07-09 17:22:13,003 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-07-09 17:22:13,181 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-07-09 17:22:13,551 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-07-09 17:22:14,005 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-07-09 17:22:14,582 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-07-09 17:22:14,959 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-07-09 17:22:15,339 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-07-09 17:22:15,761 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-07-09 17:22:16,123 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-07-09 17:22:16,650 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-07-09 17:22:17,499 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-07-09 17:22:17,717 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-07-09 17:22:17,954 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-07-09 17:22:18,196 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-07-09 17:22:18,422 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-07-09 17:22:19,161 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-07-09 17:22:19,859 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-07-09 17:22:20,010 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-07-09 17:22:20,178 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-07-09 17:22:20,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:20,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:20,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:22:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050268002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:20,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:22:20,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387736957] [2021-07-09 17:22:20,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:22:20,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:20,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:22:20,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:20,496 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,708 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-07-09 17:22:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:22:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,711 INFO L225 Difference]: With dead ends: 961 [2021-07-09 17:22:20,711 INFO L226 Difference]: Without dead ends: 958 [2021-07-09 17:22:20,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-07-09 17:22:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-07-09 17:22:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-07-09 17:22:20,723 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-07-09 17:22:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,723 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-07-09 17:22:20,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-07-09 17:22:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:22:20,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,724 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-07-09 17:22:20,929 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-07-09 17:22:20,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642880245] [2021-07-09 17:22:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:21,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642880245] [2021-07-09 17:22:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642880245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095036302] [2021-07-09 17:22:21,005 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 17:22:21,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:22:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,415 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:22:21,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:21,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:22:22,161 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-07-09 17:22:22,299 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-07-09 17:22:22,484 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-07-09 17:22:23,153 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-07-09 17:22:23,293 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-07-09 17:22:23,635 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-09 17:22:23,977 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-09 17:22:24,397 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-07-09 17:22:24,958 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-07-09 17:22:25,189 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-07-09 17:22:25,348 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-07-09 17:22:25,458 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 237 [2021-07-09 17:22:26,104 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-07-09 17:22:27,323 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-07-09 17:22:27,595 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-07-09 17:22:27,959 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-07-09 17:22:29,137 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-07-09 17:22:29,683 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-07-09 17:22:29,943 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-07-09 17:22:30,991 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-07-09 17:22:31,179 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-07-09 17:22:32,121 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-07-09 17:22:32,940 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-07-09 17:22:33,820 WARN L205 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-07-09 17:22:34,959 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-07-09 17:22:35,521 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-07-09 17:22:35,989 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-07-09 17:22:36,159 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-07-09 17:22:36,291 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-07-09 17:22:36,752 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-07-09 17:22:36,968 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-07-09 17:22:37,519 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-07-09 17:22:37,697 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-07-09 17:22:37,851 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-07-09 17:22:38,742 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-07-09 17:22:39,001 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-07-09 17:22:39,290 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-07-09 17:22:39,629 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-07-09 17:22:39,768 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-07-09 17:22:40,376 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-07-09 17:22:40,509 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-07-09 17:22:40,642 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-07-09 17:22:41,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:41,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:41,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:41,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:22:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:41,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095036302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:41,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:41,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:22:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788062250] [2021-07-09 17:22:41,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:22:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:22:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:41,303 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:41,582 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-07-09 17:22:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:22:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:41,584 INFO L225 Difference]: With dead ends: 1077 [2021-07-09 17:22:41,585 INFO L226 Difference]: Without dead ends: 1074 [2021-07-09 17:22:41,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-09 17:22:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-07-09 17:22:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-07-09 17:22:41,598 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-07-09 17:22:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:41,598 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-07-09 17:22:41,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-07-09 17:22:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:22:41,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:41,600 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:41,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-07-09 17:22:41,801 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-07-09 17:22:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214713235] [2021-07-09 17:22:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214713235] [2021-07-09 17:22:41,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214713235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:41,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894068920] [2021-07-09 17:22:41,877 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 17:22:41,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:22:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:42,288 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:22:42,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:42,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:22:43,306 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-07-09 17:22:44,030 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-07-09 17:22:44,863 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-07-09 17:22:45,040 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-07-09 17:22:45,721 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-07-09 17:22:46,449 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-07-09 17:22:47,304 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-07-09 17:22:48,131 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-07-09 17:22:49,300 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-07-09 17:22:50,038 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-07-09 17:22:50,452 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-07-09 17:22:51,003 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-07-09 17:22:52,042 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 242 [2021-07-09 17:22:52,184 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-07-09 17:22:52,460 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-07-09 17:22:52,883 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-07-09 17:22:53,418 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-07-09 17:22:53,948 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-07-09 17:22:54,660 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-07-09 17:22:55,109 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-07-09 17:22:55,415 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-07-09 17:22:55,875 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 311 [2021-07-09 17:22:56,431 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-07-09 17:22:56,604 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-07-09 17:22:56,828 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-07-09 17:22:57,064 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-07-09 17:22:57,313 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-07-09 17:22:57,496 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-07-09 17:22:58,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:22:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894068920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:58,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:22:58,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055800680] [2021-07-09 17:22:58,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:22:58,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:22:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:58,548 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:58,856 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-07-09 17:22:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:58,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:22:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:58,859 INFO L225 Difference]: With dead ends: 1209 [2021-07-09 17:22:58,859 INFO L226 Difference]: Without dead ends: 1206 [2021-07-09 17:22:58,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-07-09 17:22:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-07-09 17:22:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-07-09 17:22:58,878 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-07-09 17:22:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-07-09 17:22:58,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-07-09 17:22:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:22:58,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:58,881 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:59,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-07-09 17:22:59,104 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-07-09 17:22:59,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:59,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884346850] [2021-07-09 17:22:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:59,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:59,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884346850] [2021-07-09 17:22:59,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884346850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151385524] [2021-07-09 17:22:59,187 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 17:22:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:59,709 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:22:59,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:59,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:23:00,702 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 258 [2021-07-09 17:23:00,813 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-07-09 17:23:01,008 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-07-09 17:23:01,258 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-07-09 17:23:01,560 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-07-09 17:23:01,927 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-07-09 17:23:02,280 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-07-09 17:23:02,685 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-07-09 17:23:03,148 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-07-09 17:23:03,337 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-07-09 17:23:04,096 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-07-09 17:23:04,270 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-07-09 17:23:04,432 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-07-09 17:23:05,486 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 180 [2021-07-09 17:23:06,772 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-07-09 17:23:07,040 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-07-09 17:23:07,469 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-07-09 17:23:07,935 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-07-09 17:23:08,805 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-07-09 17:23:09,084 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-07-09 17:23:09,356 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-07-09 17:23:09,663 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-07-09 17:23:10,091 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-07-09 17:23:10,407 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-07-09 17:23:10,925 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-07-09 17:23:11,420 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-07-09 17:23:11,920 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-07-09 17:23:12,485 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-07-09 17:23:13,027 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-07-09 17:23:13,531 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-07-09 17:23:13,984 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-07-09 17:23:14,809 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-07-09 17:23:14,915 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 219 [2021-07-09 17:23:15,404 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-07-09 17:23:15,589 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-07-09 17:23:15,944 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-07-09 17:23:16,228 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-07-09 17:23:16,523 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-07-09 17:23:16,837 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-07-09 17:23:17,126 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-07-09 17:23:17,323 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-07-09 17:23:17,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:17,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:17,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:17,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:23:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151385524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:23:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035093892] [2021-07-09 17:23:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:17,685 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:17,963 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-07-09 17:23:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:23:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:23:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:17,968 INFO L225 Difference]: With dead ends: 1356 [2021-07-09 17:23:17,968 INFO L226 Difference]: Without dead ends: 1353 [2021-07-09 17:23:17,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-07-09 17:23:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-07-09 17:23:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-07-09 17:23:17,992 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-07-09 17:23:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:17,993 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-07-09 17:23:17,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-07-09 17:23:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:17,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:17,995 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:18,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-07-09 17:23:18,214 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-07-09 17:23:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:18,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377644099] [2021-07-09 17:23:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:18,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377644099] [2021-07-09 17:23:18,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377644099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606297499] [2021-07-09 17:23:18,299 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 17:23:18,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:18,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:23:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:18,754 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:23:18,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:18,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:23:19,410 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-07-09 17:23:19,555 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-07-09 17:23:19,738 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-07-09 17:23:20,403 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-07-09 17:23:20,550 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-07-09 17:23:20,893 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-07-09 17:23:21,253 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-07-09 17:23:21,668 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-07-09 17:23:22,380 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-07-09 17:23:22,705 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-07-09 17:23:23,174 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-07-09 17:23:23,425 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-07-09 17:23:23,596 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-07-09 17:23:24,562 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-07-09 17:23:24,721 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-07-09 17:23:25,409 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 263 [2021-07-09 17:23:25,546 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-07-09 17:23:25,763 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-07-09 17:23:26,167 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-07-09 17:23:26,336 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-07-09 17:23:26,462 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-07-09 17:23:27,128 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-07-09 17:23:27,314 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-07-09 17:23:27,473 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-07-09 17:23:28,250 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-07-09 17:23:28,598 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-07-09 17:23:29,344 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-07-09 17:23:30,317 WARN L205 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-07-09 17:23:30,632 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-07-09 17:23:31,179 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-07-09 17:23:31,547 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-07-09 17:23:31,802 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-07-09 17:23:31,969 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-07-09 17:23:32,787 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-07-09 17:23:32,954 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-07-09 17:23:33,171 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-07-09 17:23:33,412 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-07-09 17:23:33,763 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-07-09 17:23:33,972 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-07-09 17:23:34,808 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 259 [2021-07-09 17:23:34,952 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-07-09 17:23:35,116 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-07-09 17:23:35,389 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-07-09 17:23:35,743 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-07-09 17:23:36,118 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-07-09 17:23:36,608 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-07-09 17:23:37,461 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-07-09 17:23:37,726 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-07-09 17:23:37,844 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 263 [2021-07-09 17:23:38,679 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-07-09 17:23:38,820 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-07-09 17:23:38,994 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-07-09 17:23:39,245 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-07-09 17:23:39,603 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-07-09 17:23:39,735 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-07-09 17:23:39,840 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 246 [2021-07-09 17:23:40,596 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 328 [2021-07-09 17:23:40,745 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-07-09 17:23:40,919 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-07-09 17:23:41,182 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-07-09 17:23:41,520 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-07-09 17:23:42,188 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-07-09 17:23:43,765 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-07-09 17:23:45,646 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-07-09 17:23:48,928 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-07-09 17:23:49,085 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-07-09 17:23:49,443 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-07-09 17:23:49,685 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-07-09 17:23:49,951 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-07-09 17:23:50,059 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-07-09 17:23:50,894 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 215 [2021-07-09 17:23:51,081 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-09 17:23:51,255 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-09 17:23:51,458 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-07-09 17:23:51,630 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-07-09 17:23:52,756 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-07-09 17:23:52,981 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-07-09 17:23:53,205 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-07-09 17:23:53,464 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-07-09 17:23:53,980 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-07-09 17:23:54,139 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-07-09 17:23:55,131 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-07-09 17:23:55,332 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-07-09 17:23:55,532 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-07-09 17:23:55,761 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-07-09 17:23:55,893 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-07-09 17:23:56,779 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-07-09 17:23:56,930 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-07-09 17:23:57,087 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-07-09 17:23:57,537 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-07-09 17:23:58,570 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-07-09 17:23:59,818 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-07-09 17:24:04,462 WARN L205 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-07-09 17:24:09,115 WARN L205 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-07-09 17:24:14,294 WARN L205 SmtUtils]: Spent 5.17 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-07-09 17:24:14,505 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-07-09 17:24:19,557 WARN L205 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-07-09 17:24:19,722 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-07-09 17:24:19,882 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-07-09 17:24:22,156 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-07-09 17:24:24,306 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-07-09 17:24:24,997 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-07-09 17:24:25,401 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-07-09 17:24:25,905 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-07-09 17:24:26,121 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-07-09 17:24:26,690 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-07-09 17:24:28,054 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-07-09 17:24:28,369 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-07-09 17:24:28,842 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 223 [2021-07-09 17:24:29,995 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-07-09 17:24:30,778 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-07-09 17:24:32,234 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-07-09 17:24:35,452 WARN L205 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-07-09 17:24:38,681 WARN L205 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-07-09 17:24:42,084 WARN L205 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-07-09 17:24:42,863 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 203 [2021-07-09 17:24:43,147 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-07-09 17:24:44,248 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-07-09 17:24:45,223 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-07-09 17:24:46,186 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-07-09 17:24:46,720 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-07-09 17:24:46,901 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-07-09 17:24:47,661 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 274 [2021-07-09 17:24:47,772 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 278 [2021-07-09 17:24:48,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:48,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:48,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:48,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:24:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606297499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:24:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673938509] [2021-07-09 17:24:48,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:48,070 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:48,369 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-07-09 17:24:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:24:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:48,376 INFO L225 Difference]: With dead ends: 1521 [2021-07-09 17:24:48,376 INFO L226 Difference]: Without dead ends: 1518 [2021-07-09 17:24:48,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-07-09 17:24:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-07-09 17:24:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-07-09 17:24:48,425 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-07-09 17:24:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:48,425 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-07-09 17:24:48,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-07-09 17:24:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:24:48,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:48,428 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:48,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-07-09 17:24:48,654 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-07-09 17:24:48,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:48,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064261325] [2021-07-09 17:24:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:48,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:48,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064261325] [2021-07-09 17:24:48,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064261325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908065242] [2021-07-09 17:24:48,727 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 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 17:24:48,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:48,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:48,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:24:48,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:49,160 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:24:49,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:24:49,886 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 248 [2021-07-09 17:24:50,008 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-07-09 17:24:50,163 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-07-09 17:24:50,934 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-07-09 17:24:51,078 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-07-09 17:24:51,258 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-07-09 17:24:51,671 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-07-09 17:24:52,166 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-07-09 17:24:52,641 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-07-09 17:24:53,210 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-07-09 17:24:54,334 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-07-09 17:24:54,927 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-07-09 17:24:55,520 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-07-09 17:24:55,747 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-07-09 17:24:56,000 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-07-09 17:24:56,247 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-07-09 17:24:57,231 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-07-09 17:24:57,398 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-07-09 17:24:58,091 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 194 [2021-07-09 17:24:58,221 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-07-09 17:24:58,515 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-07-09 17:24:59,417 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-07-09 17:25:00,268 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-07-09 17:25:00,942 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-07-09 17:25:01,808 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-07-09 17:25:02,910 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-07-09 17:25:03,989 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-07-09 17:25:04,241 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-07-09 17:25:04,459 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-07-09 17:25:04,654 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-07-09 17:25:05,426 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 239 [2021-07-09 17:25:06,208 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-07-09 17:25:06,468 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-07-09 17:25:06,809 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-07-09 17:25:07,034 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-07-09 17:25:08,427 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-07-09 17:25:08,682 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-07-09 17:25:09,407 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-07-09 17:25:10,143 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-07-09 17:25:11,071 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-07-09 17:25:12,173 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-07-09 17:25:14,570 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-07-09 17:25:15,083 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-07-09 17:25:15,297 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-07-09 17:25:16,923 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-07-09 17:25:17,186 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-07-09 17:25:17,528 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-07-09 17:25:17,955 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-07-09 17:25:18,522 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-07-09 17:25:19,505 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-07-09 17:25:20,169 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-07-09 17:25:20,508 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-07-09 17:25:20,903 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-07-09 17:25:21,890 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-07-09 17:25:22,896 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-07-09 17:25:23,181 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-07-09 17:25:23,424 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-07-09 17:25:23,594 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-07-09 17:25:24,380 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 230 [2021-07-09 17:25:24,529 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-07-09 17:25:24,725 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-07-09 17:25:25,489 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-07-09 17:25:25,649 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-07-09 17:25:26,035 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-07-09 17:25:26,256 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-07-09 17:25:27,351 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-07-09 17:25:28,083 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-07-09 17:25:28,791 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-07-09 17:25:29,703 WARN L205 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-07-09 17:25:30,631 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-07-09 17:25:31,785 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-07-09 17:25:34,105 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-07-09 17:25:36,926 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-07-09 17:25:42,846 WARN L205 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-07-09 17:25:49,202 WARN L205 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-07-09 17:25:56,890 WARN L205 SmtUtils]: Spent 7.67 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-07-09 17:26:04,800 WARN L205 SmtUtils]: Spent 7.90 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-07-09 17:26:13,294 WARN L205 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-07-09 17:26:14,087 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-07-09 17:26:27,037 WARN L205 SmtUtils]: Spent 12.94 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-07-09 17:26:29,909 WARN L205 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-07-09 17:26:31,943 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-07-09 17:26:32,256 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-07-09 17:26:32,453 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-07-09 17:26:32,583 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-07-09 17:26:33,113 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-07-09 17:26:33,541 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-07-09 17:26:34,290 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-07-09 17:26:35,916 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-07-09 17:26:36,435 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-07-09 17:26:36,792 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-07-09 17:26:37,444 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-07-09 17:26:37,633 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-07-09 17:26:38,235 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-07-09 17:26:39,387 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-07-09 17:26:41,702 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-07-09 17:26:45,469 WARN L205 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-07-09 17:26:46,901 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-07-09 17:26:48,299 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-07-09 17:26:48,448 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-07-09 17:26:48,871 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-07-09 17:26:49,008 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-07-09 17:26:49,626 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-07-09 17:26:49,823 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-07-09 17:26:50,306 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-07-09 17:26:51,323 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-07-09 17:26:52,305 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-07-09 17:26:52,848 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-07-09 17:26:53,019 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-07-09 17:26:53,331 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-07-09 17:26:53,918 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-07-09 17:26:54,185 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-07-09 17:26:54,559 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-07-09 17:26:55,384 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-07-09 17:26:57,482 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-07-09 17:27:00,643 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-07-09 17:27:04,614 WARN L205 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-07-09 17:27:09,118 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-07-09 17:27:13,627 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-07-09 17:27:18,492 WARN L205 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-07-09 17:27:20,936 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-07-09 17:27:21,117 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-07-09 17:27:22,452 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-07-09 17:27:22,619 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-07-09 17:27:23,101 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-07-09 17:27:23,675 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-07-09 17:27:24,051 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-07-09 17:27:24,490 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-07-09 17:27:24,931 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-07-09 17:27:25,118 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-07-09 17:27:25,375 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 136 [2021-07-09 17:27:25,555 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-07-09 17:27:26,221 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-07-09 17:27:26,889 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-07-09 17:27:27,614 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-07-09 17:27:28,243 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-07-09 17:27:28,362 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-07-09 17:27:28,498 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-07-09 17:27:28,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:27:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:28,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908065242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:28,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:27:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740553272] [2021-07-09 17:27:28,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:27:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:27:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:28,687 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:28,998 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-07-09 17:27:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:27:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:27:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:29,002 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 17:27:29,003 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 17:27:29,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 17:27:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-07-09 17:27:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-07-09 17:27:29,034 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-07-09 17:27:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:29,034 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-07-09 17:27:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-07-09 17:27:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:27:29,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:29,037 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:29,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,261 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-07-09 17:27:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:29,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31652518] [2021-07-09 17:27:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:27:29,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31652518] [2021-07-09 17:27:29,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31652518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121426170] [2021-07-09 17:27:29,335 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 17:27:29,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:27:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:29,758 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:27:29,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:27:30,553 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-07-09 17:27:30,703 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-07-09 17:27:30,888 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-07-09 17:27:31,086 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-07-09 17:27:31,309 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-07-09 17:27:31,704 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-07-09 17:27:32,190 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-07-09 17:27:32,405 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-07-09 17:27:32,624 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-07-09 17:27:32,793 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-07-09 17:27:32,897 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 268 [2021-07-09 17:27:33,329 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-07-09 17:27:33,605 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-07-09 17:27:34,277 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-07-09 17:27:34,939 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-07-09 17:27:35,167 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-07-09 17:27:35,551 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-07-09 17:27:36,002 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-07-09 17:27:36,628 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-07-09 17:27:37,133 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-07-09 17:27:37,358 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 266 [2021-07-09 17:27:38,118 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 220 [2021-07-09 17:27:38,236 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 221 [2021-07-09 17:27:38,413 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-07-09 17:27:38,718 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-07-09 17:27:39,074 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-07-09 17:27:40,029 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-07-09 17:27:41,355 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-07-09 17:27:42,954 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-07-09 17:27:43,446 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-07-09 17:27:43,690 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-07-09 17:27:43,858 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 253 [2021-07-09 17:27:44,121 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-07-09 17:27:44,929 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 234 [2021-07-09 17:27:45,107 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-07-09 17:27:45,472 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-07-09 17:27:45,930 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-07-09 17:27:46,208 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-07-09 17:27:46,384 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-07-09 17:27:47,010 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-07-09 17:27:47,710 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 234 [2021-07-09 17:27:47,985 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-07-09 17:27:48,477 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-07-09 17:27:49,077 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-07-09 17:27:50,227 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-07-09 17:27:51,671 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-07-09 17:27:54,950 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-07-09 17:27:58,244 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-07-09 17:28:01,788 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-07-09 17:28:01,927 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-07-09 17:28:02,144 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-07-09 17:28:02,982 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 220 [2021-07-09 17:28:04,033 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-07-09 17:28:04,318 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-07-09 17:28:04,981 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-07-09 17:28:05,095 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-07-09 17:28:05,508 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-07-09 17:28:05,814 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-07-09 17:28:06,993 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-07-09 17:28:07,870 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-07-09 17:28:08,444 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-07-09 17:28:08,622 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-07-09 17:28:08,842 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-07-09 17:28:09,102 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-07-09 17:28:09,361 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-07-09 17:28:09,725 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-07-09 17:28:10,229 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-07-09 17:28:11,053 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-07-09 17:28:11,189 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-07-09 17:28:11,928 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-07-09 17:28:12,395 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-07-09 17:28:13,061 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 225 [2021-07-09 17:28:13,626 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-07-09 17:28:13,797 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-07-09 17:28:14,044 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-07-09 17:28:14,227 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-07-09 17:28:14,970 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-07-09 17:28:15,704 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-07-09 17:28:16,512 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-07-09 17:28:17,304 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-07-09 17:28:17,501 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-07-09 17:28:18,190 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-07-09 17:28:18,297 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 206 [2021-07-09 17:28:18,458 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 211 [2021-07-09 17:28:18,615 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 211 [2021-07-09 17:28:18,998 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-07-09 17:28:19,258 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-07-09 17:28:19,505 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-07-09 17:28:19,779 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-07-09 17:28:20,122 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-07-09 17:28:20,417 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-07-09 17:28:20,869 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-07-09 17:28:21,198 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-07-09 17:28:21,315 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-07-09 17:28:21,439 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-07-09 17:28:21,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:28:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121426170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:21,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:21,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:28:21,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580773806] [2021-07-09 17:28:21,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:21,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:21,727 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:22,054 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-07-09 17:28:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:28:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:28:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:22,059 INFO L225 Difference]: With dead ends: 1787 [2021-07-09 17:28:22,059 INFO L226 Difference]: Without dead ends: 1784 [2021-07-09 17:28:22,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-09 17:28:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-07-09 17:28:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-07-09 17:28:22,119 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-07-09 17:28:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:22,119 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-07-09 17:28:22,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-07-09 17:28:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:28:22,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:22,122 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:22,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-07-09 17:28:22,337 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-07-09 17:28:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:22,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552397628] [2021-07-09 17:28:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:22,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:22,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552397628] [2021-07-09 17:28:22,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552397628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:22,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503219120] [2021-07-09 17:28:22,428 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 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 17:28:22,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:28:22,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:28:22,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:22,904 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:28:22,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:28:23,619 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-07-09 17:28:23,813 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-07-09 17:28:24,013 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-07-09 17:28:24,216 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-07-09 17:28:24,453 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-07-09 17:28:24,814 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-07-09 17:28:25,438 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-07-09 17:28:25,630 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-07-09 17:28:25,761 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-07-09 17:28:25,945 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-07-09 17:28:26,854 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-07-09 17:28:27,058 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-07-09 17:28:27,894 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 210 [2021-07-09 17:28:28,037 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-07-09 17:28:28,319 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-07-09 17:28:29,247 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 210 [2021-07-09 17:28:29,397 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-07-09 17:28:30,382 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-07-09 17:28:30,558 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-07-09 17:28:30,921 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-07-09 17:28:31,628 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-07-09 17:28:32,613 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-07-09 17:28:33,834 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-07-09 17:28:35,071 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-07-09 17:28:36,440 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-07-09 17:28:39,556 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-07-09 17:28:41,470 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-07-09 17:28:41,759 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-07-09 17:28:41,899 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-07-09 17:28:42,659 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 212 [2021-07-09 17:28:43,287 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 192 [2021-07-09 17:28:44,076 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-07-09 17:28:44,695 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-07-09 17:28:45,126 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-07-09 17:28:46,116 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-07-09 17:28:47,774 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-07-09 17:28:48,942 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-07-09 17:28:50,203 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-07-09 17:28:50,949 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-07-09 17:28:51,461 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-07-09 17:28:51,866 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-07-09 17:28:52,485 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-09 17:28:52,651 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-09 17:28:52,821 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-07-09 17:28:53,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:53,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:28:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503219120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:53,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:53,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:28:53,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513763891] [2021-07-09 17:28:53,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:28:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:28:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:53,911 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:54,155 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-07-09 17:28:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:28:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:28:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:54,159 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 17:28:54,159 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:28:54,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:28:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-07-09 17:28:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-07-09 17:28:54,190 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-07-09 17:28:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:54,191 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-07-09 17:28:54,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-07-09 17:28:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:28:54,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:54,195 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:54,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:54,410 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-07-09 17:28:54,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:54,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453576408] [2021-07-09 17:28:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:54,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:54,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453576408] [2021-07-09 17:28:54,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453576408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858561915] [2021-07-09 17:28:54,497 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 17:28:54,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:28:54,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:28:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:54,960 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:28:54,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:28:55,577 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-07-09 17:28:55,717 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-07-09 17:28:56,411 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-07-09 17:28:57,230 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-07-09 17:28:57,716 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-07-09 17:28:58,188 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-07-09 17:28:58,758 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-07-09 17:28:59,381 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-07-09 17:28:59,538 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-07-09 17:28:59,657 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-07-09 17:29:00,700 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-07-09 17:29:02,430 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-07-09 17:29:02,654 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-07-09 17:29:02,961 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-07-09 17:29:03,409 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-07-09 17:29:03,994 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-07-09 17:29:04,575 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-07-09 17:29:05,369 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-07-09 17:29:05,938 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-07-09 17:29:06,146 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-07-09 17:29:06,269 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-07-09 17:29:06,625 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 285 [2021-07-09 17:29:06,998 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 240 [2021-07-09 17:29:07,144 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-07-09 17:29:07,545 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-07-09 17:29:07,703 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-07-09 17:29:07,881 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-07-09 17:29:08,063 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-07-09 17:29:08,225 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-07-09 17:29:08,448 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-07-09 17:29:09,246 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-07-09 17:29:10,280 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-07-09 17:29:10,472 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-07-09 17:29:10,672 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-07-09 17:29:10,889 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-07-09 17:29:11,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:11,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:29:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858561915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:11,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:29:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483112707] [2021-07-09 17:29:11,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:29:11,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:11,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:29:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:11,557 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:11,845 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-07-09 17:29:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:29:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:11,849 INFO L225 Difference]: With dead ends: 2066 [2021-07-09 17:29:11,849 INFO L226 Difference]: Without dead ends: 2063 [2021-07-09 17:29:11,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-07-09 17:29:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-07-09 17:29:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-07-09 17:29:11,887 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-07-09 17:29:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:11,887 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-07-09 17:29:11,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-07-09 17:29:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:29:11,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:11,892 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:12,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:12,116 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-07-09 17:29:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:12,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518486152] [2021-07-09 17:29:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:12,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:12,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518486152] [2021-07-09 17:29:12,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518486152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:12,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656956484] [2021-07-09 17:29:12,204 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 17:29:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:29:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:12,681 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-09 17:29:12,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-09 17:29:13,677 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-07-09 17:29:13,848 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-07-09 17:29:14,075 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-07-09 17:29:14,212 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-07-09 17:29:15,120 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 177 [2021-07-09 17:29:15,266 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-07-09 17:29:15,475 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-07-09 17:29:15,667 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-07-09 17:29:15,772 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 236 [2021-07-09 17:29:16,799 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 202 [2021-07-09 17:29:16,940 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-07-09 17:29:17,156 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-07-09 17:29:17,478 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-07-09 17:29:17,859 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-07-09 17:29:18,031 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-07-09 17:29:18,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 211 [2021-07-09 17:29:19,306 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 203 [2021-07-09 17:29:19,496 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-07-09 17:29:19,720 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-07-09 17:29:19,997 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-07-09 17:29:20,705 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-07-09 17:29:21,619 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-07-09 17:29:22,696 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-07-09 17:29:22,982 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-07-09 17:29:23,101 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-07-09 17:29:24,359 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-07-09 17:29:24,559 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-07-09 17:29:24,872 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-07-09 17:29:25,221 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-07-09 17:29:25,639 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-07-09 17:29:25,774 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-07-09 17:29:27,116 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-07-09 17:29:27,281 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-07-09 17:29:27,543 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-07-09 17:29:27,914 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-07-09 17:29:28,363 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-07-09 17:29:29,291 WARN L205 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-07-09 17:29:30,735 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-07-09 17:29:31,896 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-07-09 17:29:34,406 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-07-09 17:29:36,887 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-07-09 17:29:39,595 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-07-09 17:29:42,579 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-07-09 17:29:42,917 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-07-09 17:29:43,566 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-07-09 17:29:43,838 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-07-09 17:29:44,862 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-07-09 17:29:45,058 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-07-09 17:29:45,336 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-07-09 17:29:45,613 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-07-09 17:29:45,875 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-07-09 17:29:46,801 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-07-09 17:29:47,673 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-07-09 17:29:47,794 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-07-09 17:29:47,928 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-07-09 17:29:48,049 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-07-09 17:29:48,659 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 183 [2021-07-09 17:29:48,770 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 187 [2021-07-09 17:29:49,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-09 17:29:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656956484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-09 17:29:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025329893] [2021-07-09 17:29:49,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:29:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:29:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:49,100 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:49,421 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-07-09 17:29:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:29:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:49,426 INFO L225 Difference]: With dead ends: 2152 [2021-07-09 17:29:49,426 INFO L226 Difference]: Without dead ends: 2149 [2021-07-09 17:29:49,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-09 17:29:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-07-09 17:29:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-07-09 17:29:49,461 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-07-09 17:29:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:49,461 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-07-09 17:29:49,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-07-09 17:29:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:49,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:49,465 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:49,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,681 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-07-09 17:29:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:49,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581600139] [2021-07-09 17:29:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:49,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581600139] [2021-07-09 17:29:49,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581600139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398757254] [2021-07-09 17:29:49,784 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 17:29:49,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398757254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:29:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886850895] [2021-07-09 17:29:49,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:49,876 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,061 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-07-09 17:29:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,064 INFO L225 Difference]: With dead ends: 2169 [2021-07-09 17:29:50,065 INFO L226 Difference]: Without dead ends: 2169 [2021-07-09 17:29:50,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-07-09 17:29:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-07-09 17:29:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-07-09 17:29:50,093 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-07-09 17:29:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,094 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-07-09 17:29:50,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-07-09 17:29:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:50,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,096 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:50,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-07-09 17:29:50,298 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-07-09 17:29:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:50,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435202205] [2021-07-09 17:29:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435202205] [2021-07-09 17:29:50,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435202205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92774078] [2021-07-09 17:29:50,435 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 17:29:50,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:29:50,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:50,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92774078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:50,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:29:50,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155350705] [2021-07-09 17:29:50,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:50,572 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,935 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-07-09 17:29:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:29:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,939 INFO L225 Difference]: With dead ends: 2262 [2021-07-09 17:29:50,939 INFO L226 Difference]: Without dead ends: 2255 [2021-07-09 17:29:50,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:29:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-09 17:29:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-07-09 17:29:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-07-09 17:29:50,978 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-07-09 17:29:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,978 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-07-09 17:29:50,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-07-09 17:29:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:50,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,983 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:51,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-07-09 17:29:51,204 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-07-09 17:29:51,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:51,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085585404] [2021-07-09 17:29:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085585404] [2021-07-09 17:29:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085585404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289514290] [2021-07-09 17:29:51,301 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 17:29:51,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:51,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289514290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:51,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:51,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145602094] [2021-07-09 17:29:51,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:51,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:51,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:51,378 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 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 17:29:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:51,555 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-07-09 17:29:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:51,556 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 22 [2021-07-09 17:29:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:51,559 INFO L225 Difference]: With dead ends: 2016 [2021-07-09 17:29:51,559 INFO L226 Difference]: Without dead ends: 2015 [2021-07-09 17:29:51,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-07-09 17:29:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-07-09 17:29:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-07-09 17:29:51,586 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-07-09 17:29:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:51,586 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-07-09 17:29:51,586 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 17:29:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-07-09 17:29:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:51,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:51,589 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:51,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:51,790 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-07-09 17:29:51,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:51,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493433166] [2021-07-09 17:29:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493433166] [2021-07-09 17:29:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493433166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617806875] [2021-07-09 17:29:51,884 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) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:51,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:29:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617806875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:51,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251262572] [2021-07-09 17:29:51,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:51,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:51,966 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 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 17:29:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,049 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-07-09 17:29:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:52,049 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 22 [2021-07-09 17:29:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,056 INFO L225 Difference]: With dead ends: 2320 [2021-07-09 17:29:52,056 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 17:29:52,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 17:29:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-07-09 17:29:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-07-09 17:29:52,096 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-07-09 17:29:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,096 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-07-09 17:29:52,097 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 17:29:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-07-09 17:29:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:52,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,100 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-07-09 17:29:52,317 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-07-09 17:29:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232955497] [2021-07-09 17:29:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:52,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232955497] [2021-07-09 17:29:52,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232955497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577532840] [2021-07-09 17:29:52,404 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 17:29:52,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:29:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:52,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577532840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:52,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836044631] [2021-07-09 17:29:52,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:52,477 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 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 17:29:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,627 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-07-09 17:29:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:52,628 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 22 [2021-07-09 17:29:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,631 INFO L225 Difference]: With dead ends: 2210 [2021-07-09 17:29:52,632 INFO L226 Difference]: Without dead ends: 2210 [2021-07-09 17:29:52,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-07-09 17:29:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-07-09 17:29:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-07-09 17:29:52,661 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-07-09 17:29:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,662 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-07-09 17:29:52,662 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 17:29:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-07-09 17:29:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:52,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,665 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:52,865 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-07-09 17:29:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691250417] [2021-07-09 17:29:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691250417] [2021-07-09 17:29:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691250417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645680610] [2021-07-09 17:29:52,954 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 17:29:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:53,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645680610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360390794] [2021-07-09 17:29:53,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:53,029 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 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 17:29:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,237 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-07-09 17:29:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:53,237 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 22 [2021-07-09 17:29:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,241 INFO L225 Difference]: With dead ends: 2207 [2021-07-09 17:29:53,241 INFO L226 Difference]: Without dead ends: 2205 [2021-07-09 17:29:53,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-07-09 17:29:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-07-09 17:29:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-07-09 17:29:53,269 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-07-09 17:29:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-07-09 17:29:53,270 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 17:29:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-07-09 17:29:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:53,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,272 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-07-09 17:29:53,477 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-07-09 17:29:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421873469] [2021-07-09 17:29:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421873469] [2021-07-09 17:29:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421873469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850988927] [2021-07-09 17:29:53,566 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 17:29:53,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850988927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144636812] [2021-07-09 17:29:53,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:53,641 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 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 17:29:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,837 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-07-09 17:29:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:53,837 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 22 [2021-07-09 17:29:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,841 INFO L225 Difference]: With dead ends: 2091 [2021-07-09 17:29:53,841 INFO L226 Difference]: Without dead ends: 2089 [2021-07-09 17:29:53,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-09 17:29:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-07-09 17:29:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-07-09 17:29:53,865 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-07-09 17:29:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,865 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-07-09 17:29:53,865 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 17:29:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-07-09 17:29:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:53,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,868 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-07-09 17:29:54,069 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-07-09 17:29:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581531861] [2021-07-09 17:29:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581531861] [2021-07-09 17:29:54,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581531861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58495906] [2021-07-09 17:29:54,156 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 17:29:54,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:29:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58495906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:54,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866211586] [2021-07-09 17:29:54,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:54,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:54,241 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 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 17:29:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,314 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-07-09 17:29:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:54,315 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 22 [2021-07-09 17:29:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,318 INFO L225 Difference]: With dead ends: 2273 [2021-07-09 17:29:54,318 INFO L226 Difference]: Without dead ends: 2273 [2021-07-09 17:29:54,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-07-09 17:29:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-07-09 17:29:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-07-09 17:29:54,345 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-07-09 17:29:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,345 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-07-09 17:29:54,345 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 17:29:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-07-09 17:29:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:54,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,348 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,549 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-07-09 17:29:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668490708] [2021-07-09 17:29:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668490708] [2021-07-09 17:29:54,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668490708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817733408] [2021-07-09 17:29:54,654 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 17:29:54,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:54,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817733408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:54,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722153655] [2021-07-09 17:29:54,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:54,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:54,722 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,929 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-07-09 17:29:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:29:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,933 INFO L225 Difference]: With dead ends: 2019 [2021-07-09 17:29:54,933 INFO L226 Difference]: Without dead ends: 2017 [2021-07-09 17:29:54,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-07-09 17:29:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-07-09 17:29:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-07-09 17:29:54,960 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-07-09 17:29:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,960 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-07-09 17:29:54,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-07-09 17:29:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:54,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,963 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:55,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,164 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:55,164 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-07-09 17:29:55,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:55,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990458421] [2021-07-09 17:29:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990458421] [2021-07-09 17:29:55,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990458421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599071653] [2021-07-09 17:29:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:29:55,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:29:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599071653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283627518] [2021-07-09 17:29:55,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:55,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:55,347 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:55,454 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-07-09 17:29:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:55,459 INFO L225 Difference]: With dead ends: 2414 [2021-07-09 17:29:55,459 INFO L226 Difference]: Without dead ends: 2414 [2021-07-09 17:29:55,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-09 17:29:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-07-09 17:29:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-07-09 17:29:55,501 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-07-09 17:29:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:55,501 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-07-09 17:29:55,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-07-09 17:29:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:55,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:55,505 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:55,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-07-09 17:29:55,729 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-07-09 17:29:55,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:55,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482867134] [2021-07-09 17:29:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482867134] [2021-07-09 17:29:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482867134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748865539] [2021-07-09 17:29:55,808 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 17:29:55,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:29:55,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:55,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748865539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:55,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821215423] [2021-07-09 17:29:55,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:55,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:55,885 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 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 17:29:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,013 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-07-09 17:29:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:56,014 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 22 [2021-07-09 17:29:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:56,017 INFO L225 Difference]: With dead ends: 2122 [2021-07-09 17:29:56,017 INFO L226 Difference]: Without dead ends: 2122 [2021-07-09 17:29:56,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-09 17:29:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-07-09 17:29:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-07-09 17:29:56,045 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-07-09 17:29:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:56,045 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-07-09 17:29:56,046 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 17:29:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-07-09 17:29:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:56,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:56,048 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:56,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-07-09 17:29:56,249 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-07-09 17:29:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:56,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976941973] [2021-07-09 17:29:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:56,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976941973] [2021-07-09 17:29:56,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976941973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994936626] [2021-07-09 17:29:56,321 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) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994936626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417530362] [2021-07-09 17:29:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:56,383 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 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 17:29:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,561 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-07-09 17:29:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:56,561 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 22 [2021-07-09 17:29:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:56,564 INFO L225 Difference]: With dead ends: 2095 [2021-07-09 17:29:56,565 INFO L226 Difference]: Without dead ends: 2093 [2021-07-09 17:29:56,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-07-09 17:29:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-07-09 17:29:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-07-09 17:29:56,593 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-07-09 17:29:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:56,593 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-07-09 17:29:56,593 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 17:29:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-07-09 17:29:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:56,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:56,596 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:56,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-07-09 17:29:56,797 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-07-09 17:29:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:56,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5589895] [2021-07-09 17:29:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:56,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5589895] [2021-07-09 17:29:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5589895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511534942] [2021-07-09 17:29:56,883 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 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 17:29:56,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511534942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:56,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:56,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496743094] [2021-07-09 17:29:56,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:56,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:56,962 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 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 17:29:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:57,152 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-07-09 17:29:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:57,152 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 22 [2021-07-09 17:29:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:57,155 INFO L225 Difference]: With dead ends: 1994 [2021-07-09 17:29:57,155 INFO L226 Difference]: Without dead ends: 1992 [2021-07-09 17:29:57,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-09 17:29:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-07-09 17:29:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-07-09 17:29:57,183 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-07-09 17:29:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:57,183 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-07-09 17:29:57,183 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 17:29:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-07-09 17:29:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:57,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:57,186 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:57,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-07-09 17:29:57,387 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-07-09 17:29:57,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:57,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230711762] [2021-07-09 17:29:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230711762] [2021-07-09 17:29:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230711762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723607931] [2021-07-09 17:29:57,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:29:57,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:29:57,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:57,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723607931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:29:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856789112] [2021-07-09 17:29:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:57,554 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 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 17:29:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:57,635 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-07-09 17:29:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:57,636 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 22 [2021-07-09 17:29:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:57,640 INFO L225 Difference]: With dead ends: 2201 [2021-07-09 17:29:57,641 INFO L226 Difference]: Without dead ends: 2201 [2021-07-09 17:29:57,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-07-09 17:29:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-07-09 17:29:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-07-09 17:29:57,672 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-07-09 17:29:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:57,672 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-07-09 17:29:57,672 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 17:29:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-07-09 17:29:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:57,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:57,675 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:57,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:57,876 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-07-09 17:29:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:57,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277721919] [2021-07-09 17:29:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:57,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277721919] [2021-07-09 17:29:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277721919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885590426] [2021-07-09 17:29:57,965 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 17:29:57,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:57,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885590426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687504305] [2021-07-09 17:29:58,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:58,046 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,250 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-07-09 17:29:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:29:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,254 INFO L225 Difference]: With dead ends: 1990 [2021-07-09 17:29:58,254 INFO L226 Difference]: Without dead ends: 1988 [2021-07-09 17:29:58,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-07-09 17:29:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-07-09 17:29:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-07-09 17:29:58,281 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-07-09 17:29:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,282 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-07-09 17:29:58,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-07-09 17:29:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:58,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,285 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:58,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:58,485 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-07-09 17:29:58,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:58,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070448201] [2021-07-09 17:29:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:58,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070448201] [2021-07-09 17:29:58,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070448201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996317077] [2021-07-09 17:29:58,558 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 17:29:58,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:29:58,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996317077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:58,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567651358] [2021-07-09 17:29:58,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:58,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:58,635 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,727 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-07-09 17:29:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,731 INFO L225 Difference]: With dead ends: 2351 [2021-07-09 17:29:58,731 INFO L226 Difference]: Without dead ends: 2351 [2021-07-09 17:29:58,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-09 17:29:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-07-09 17:29:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-07-09 17:29:58,762 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-07-09 17:29:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,762 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-07-09 17:29:58,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-07-09 17:29:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:58,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,765 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:58,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-07-09 17:29:58,966 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-07-09 17:29:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:58,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223969045] [2021-07-09 17:29:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223969045] [2021-07-09 17:29:59,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223969045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340243322] [2021-07-09 17:29:59,068 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 17:29:59,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:29:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340243322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229667811] [2021-07-09 17:29:59,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:59,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:59,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:59,149 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,346 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-07-09 17:29:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,349 INFO L225 Difference]: With dead ends: 1995 [2021-07-09 17:29:59,349 INFO L226 Difference]: Without dead ends: 1992 [2021-07-09 17:29:59,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-09 17:29:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-07-09 17:29:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-07-09 17:29:59,374 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-07-09 17:29:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,374 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-07-09 17:29:59,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-07-09 17:29:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:59,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,377 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-07-09 17:29:59,577 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-07-09 17:29:59,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810774112] [2021-07-09 17:29:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810774112] [2021-07-09 17:29:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810774112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351341087] [2021-07-09 17:29:59,659 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 17:29:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351341087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:29:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719341467] [2021-07-09 17:29:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:59,733 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,874 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-07-09 17:29:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:29:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,879 INFO L225 Difference]: With dead ends: 3202 [2021-07-09 17:29:59,880 INFO L226 Difference]: Without dead ends: 3202 [2021-07-09 17:29:59,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-07-09 17:29:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-07-09 17:29:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-07-09 17:29:59,923 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-07-09 17:29:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,923 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-07-09 17:29:59,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-07-09 17:29:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:59,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,926 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:00,127 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-07-09 17:30:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987774406] [2021-07-09 17:30:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987774406] [2021-07-09 17:30:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987774406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418156113] [2021-07-09 17:30:00,206 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 17:30:00,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:00,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418156113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:00,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:00,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233582369] [2021-07-09 17:30:00,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:00,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:00,291 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 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 17:30:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:00,426 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-07-09 17:30:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:00,427 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 22 [2021-07-09 17:30:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:00,431 INFO L225 Difference]: With dead ends: 2785 [2021-07-09 17:30:00,432 INFO L226 Difference]: Without dead ends: 2785 [2021-07-09 17:30:00,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-07-09 17:30:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-07-09 17:30:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-07-09 17:30:00,469 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-07-09 17:30:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:00,469 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-07-09 17:30:00,469 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 17:30:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-07-09 17:30:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:00,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:00,472 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:00,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-07-09 17:30:00,672 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-07-09 17:30:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:00,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639871630] [2021-07-09 17:30:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639871630] [2021-07-09 17:30:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639871630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562365467] [2021-07-09 17:30:00,739 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 17:30:00,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:00,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562365467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:00,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166992167] [2021-07-09 17:30:00,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:00,811 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 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 17:30:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:00,985 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-07-09 17:30:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:00,986 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 22 [2021-07-09 17:30:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:00,990 INFO L225 Difference]: With dead ends: 2747 [2021-07-09 17:30:00,990 INFO L226 Difference]: Without dead ends: 2745 [2021-07-09 17:30:00,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-07-09 17:30:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-07-09 17:30:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-07-09 17:30:01,029 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-07-09 17:30:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:01,029 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-07-09 17:30:01,030 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 17:30:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-07-09 17:30:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:01,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:01,033 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:01,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:01,233 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-07-09 17:30:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:01,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055403450] [2021-07-09 17:30:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055403450] [2021-07-09 17:30:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055403450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892582819] [2021-07-09 17:30:01,305 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 17:30:01,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892582819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263915589] [2021-07-09 17:30:01,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:01,371 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 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 17:30:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:01,551 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-07-09 17:30:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:01,552 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 22 [2021-07-09 17:30:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:01,556 INFO L225 Difference]: With dead ends: 2659 [2021-07-09 17:30:01,557 INFO L226 Difference]: Without dead ends: 2657 [2021-07-09 17:30:01,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-07-09 17:30:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-07-09 17:30:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-07-09 17:30:01,596 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-07-09 17:30:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:01,596 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-07-09 17:30:01,596 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 17:30:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-07-09 17:30:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:01,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:01,600 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:01,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-07-09 17:30:01,802 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-07-09 17:30:01,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:01,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213887353] [2021-07-09 17:30:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213887353] [2021-07-09 17:30:01,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213887353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319454306] [2021-07-09 17:30:01,871 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) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:01,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319454306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:01,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911876720] [2021-07-09 17:30:01,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:01,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:01,941 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 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 17:30:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,017 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-07-09 17:30:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:02,018 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 22 [2021-07-09 17:30:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,022 INFO L225 Difference]: With dead ends: 2808 [2021-07-09 17:30:02,022 INFO L226 Difference]: Without dead ends: 2808 [2021-07-09 17:30:02,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-07-09 17:30:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-07-09 17:30:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-07-09 17:30:02,059 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-07-09 17:30:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,059 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-07-09 17:30:02,060 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 17:30:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-07-09 17:30:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:02,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,063 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-07-09 17:30:02,263 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-07-09 17:30:02,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236611765] [2021-07-09 17:30:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236611765] [2021-07-09 17:30:02,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236611765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820512680] [2021-07-09 17:30:02,337 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 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 17:30:02,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820512680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:02,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408419776] [2021-07-09 17:30:02,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:02,414 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,601 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-07-09 17:30:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:30:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,606 INFO L225 Difference]: With dead ends: 2648 [2021-07-09 17:30:02,606 INFO L226 Difference]: Without dead ends: 2646 [2021-07-09 17:30:02,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-09 17:30:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-07-09 17:30:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-07-09 17:30:02,645 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-07-09 17:30:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,645 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-07-09 17:30:02,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-07-09 17:30:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:02,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,669 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-07-09 17:30:02,870 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-07-09 17:30:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300432892] [2021-07-09 17:30:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300432892] [2021-07-09 17:30:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300432892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699851668] [2021-07-09 17:30:02,938 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 17:30:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699851668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489321753] [2021-07-09 17:30:03,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:03,013 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,110 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-07-09 17:30:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,115 INFO L225 Difference]: With dead ends: 2940 [2021-07-09 17:30:03,115 INFO L226 Difference]: Without dead ends: 2940 [2021-07-09 17:30:03,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-07-09 17:30:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-07-09 17:30:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 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 17:30:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-07-09 17:30:03,160 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-07-09 17:30:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,161 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-07-09 17:30:03,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-07-09 17:30:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:03,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,164 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-07-09 17:30:03,376 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-07-09 17:30:03,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82484663] [2021-07-09 17:30:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82484663] [2021-07-09 17:30:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82484663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437750212] [2021-07-09 17:30:03,467 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 17:30:03,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:03,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437750212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:03,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789475518] [2021-07-09 17:30:03,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:03,545 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,777 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-07-09 17:30:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,783 INFO L225 Difference]: With dead ends: 2660 [2021-07-09 17:30:03,783 INFO L226 Difference]: Without dead ends: 2657 [2021-07-09 17:30:03,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-07-09 17:30:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-07-09 17:30:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-07-09 17:30:03,835 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-07-09 17:30:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,836 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-07-09 17:30:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-07-09 17:30:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:03,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,840 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:04,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:04,065 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-07-09 17:30:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:04,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354802566] [2021-07-09 17:30:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:04,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354802566] [2021-07-09 17:30:04,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354802566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887160433] [2021-07-09 17:30:04,136 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 17:30:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887160433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331689109] [2021-07-09 17:30:04,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:04,220 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:04,323 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-07-09 17:30:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:04,330 INFO L225 Difference]: With dead ends: 4123 [2021-07-09 17:30:04,331 INFO L226 Difference]: Without dead ends: 4123 [2021-07-09 17:30:04,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-07-09 17:30:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-07-09 17:30:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-07-09 17:30:04,417 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-07-09 17:30:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:04,418 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-07-09 17:30:04,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-07-09 17:30:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:04,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:04,421 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:04,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:04,621 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-07-09 17:30:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:04,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897055192] [2021-07-09 17:30:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897055192] [2021-07-09 17:30:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897055192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979125965] [2021-07-09 17:30:04,706 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 17:30:04,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:04,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979125965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534807436] [2021-07-09 17:30:04,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:04,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:04,776 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:04,964 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-07-09 17:30:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:04,971 INFO L225 Difference]: With dead ends: 3810 [2021-07-09 17:30:04,971 INFO L226 Difference]: Without dead ends: 3806 [2021-07-09 17:30:04,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-07-09 17:30:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-07-09 17:30:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-07-09 17:30:05,034 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-07-09 17:30:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,034 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-07-09 17:30:05,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-07-09 17:30:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:05,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,038 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,238 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-07-09 17:30:05,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711295747] [2021-07-09 17:30:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711295747] [2021-07-09 17:30:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711295747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671608012] [2021-07-09 17:30:05,315 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 17:30:05,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:05,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671608012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:05,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:05,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688802545] [2021-07-09 17:30:05,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:05,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:05,406 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,572 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-07-09 17:30:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,583 INFO L225 Difference]: With dead ends: 5567 [2021-07-09 17:30:05,583 INFO L226 Difference]: Without dead ends: 5567 [2021-07-09 17:30:05,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-07-09 17:30:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-07-09 17:30:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-07-09 17:30:05,709 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-07-09 17:30:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,709 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-07-09 17:30:05,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-07-09 17:30:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:05,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,714 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,915 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-07-09 17:30:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792566103] [2021-07-09 17:30:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792566103] [2021-07-09 17:30:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792566103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227082433] [2021-07-09 17:30:05,987 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 17:30:06,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:30:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:06,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227082433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:06,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712961575] [2021-07-09 17:30:06,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:06,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:06,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:06,057 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 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 17:30:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:06,172 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-07-09 17:30:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:06,172 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 22 [2021-07-09 17:30:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:06,184 INFO L225 Difference]: With dead ends: 5072 [2021-07-09 17:30:06,184 INFO L226 Difference]: Without dead ends: 5072 [2021-07-09 17:30:06,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-07-09 17:30:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-07-09 17:30:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-07-09 17:30:06,270 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-07-09 17:30:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:06,270 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-07-09 17:30:06,271 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 17:30:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-07-09 17:30:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:06,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:06,275 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:06,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-07-09 17:30:06,476 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:06,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-07-09 17:30:06,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:06,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783703150] [2021-07-09 17:30:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:06,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783703150] [2021-07-09 17:30:06,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783703150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9673187] [2021-07-09 17:30:06,542 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 17:30:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:06,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9673187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128082567] [2021-07-09 17:30:06,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:06,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:06,604 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 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 17:30:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:06,791 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-07-09 17:30:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:06,791 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 22 [2021-07-09 17:30:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:06,802 INFO L225 Difference]: With dead ends: 5066 [2021-07-09 17:30:06,802 INFO L226 Difference]: Without dead ends: 5064 [2021-07-09 17:30:06,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-07-09 17:30:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-07-09 17:30:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-07-09 17:30:06,911 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-07-09 17:30:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:06,911 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-07-09 17:30:06,911 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 17:30:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-07-09 17:30:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:06,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:06,916 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,118 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-07-09 17:30:07,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274894348] [2021-07-09 17:30:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274894348] [2021-07-09 17:30:07,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274894348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411845688] [2021-07-09 17:30:07,197 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 17:30:07,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:07,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411845688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:07,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35351353] [2021-07-09 17:30:07,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:07,259 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 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 17:30:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:07,437 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-07-09 17:30:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:07,437 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 22 [2021-07-09 17:30:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:07,447 INFO L225 Difference]: With dead ends: 5001 [2021-07-09 17:30:07,447 INFO L226 Difference]: Without dead ends: 4999 [2021-07-09 17:30:07,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-07-09 17:30:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-07-09 17:30:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-07-09 17:30:07,540 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-07-09 17:30:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:07,540 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-07-09 17:30:07,540 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 17:30:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-07-09 17:30:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:07,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:07,545 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-07-09 17:30:07,767 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-07-09 17:30:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109085116] [2021-07-09 17:30:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109085116] [2021-07-09 17:30:07,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109085116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605638770] [2021-07-09 17:30:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:30:07,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:07,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605638770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:07,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001329481] [2021-07-09 17:30:07,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:07,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:07,940 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 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 17:30:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,024 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-07-09 17:30:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:08,024 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 22 [2021-07-09 17:30:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,034 INFO L225 Difference]: With dead ends: 5161 [2021-07-09 17:30:08,034 INFO L226 Difference]: Without dead ends: 5161 [2021-07-09 17:30:08,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-07-09 17:30:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-07-09 17:30:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-07-09 17:30:08,141 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-07-09 17:30:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,141 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-07-09 17:30:08,142 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 17:30:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-07-09 17:30:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:08,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,146 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-07-09 17:30:08,347 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,347 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-07-09 17:30:08,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520568451] [2021-07-09 17:30:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520568451] [2021-07-09 17:30:08,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520568451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478367376] [2021-07-09 17:30:08,423 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 17:30:08,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478367376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:08,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:08,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645905002] [2021-07-09 17:30:08,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:08,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:08,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:08,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:08,507 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,718 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-07-09 17:30:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:30:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,733 INFO L225 Difference]: With dead ends: 5011 [2021-07-09 17:30:08,733 INFO L226 Difference]: Without dead ends: 5009 [2021-07-09 17:30:08,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-07-09 17:30:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-07-09 17:30:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-07-09 17:30:08,850 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-07-09 17:30:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,851 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-07-09 17:30:08,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-07-09 17:30:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:08,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,855 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:09,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-07-09 17:30:09,073 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-07-09 17:30:09,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:09,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505115105] [2021-07-09 17:30:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505115105] [2021-07-09 17:30:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505115105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589465680] [2021-07-09 17:30:09,138 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 17:30:09,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:09,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589465680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:09,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068477055] [2021-07-09 17:30:09,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:09,216 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:09,330 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-07-09 17:30:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:09,338 INFO L225 Difference]: With dead ends: 5260 [2021-07-09 17:30:09,338 INFO L226 Difference]: Without dead ends: 5260 [2021-07-09 17:30:09,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-07-09 17:30:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-07-09 17:30:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-07-09 17:30:09,424 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-07-09 17:30:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:09,424 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-07-09 17:30:09,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-07-09 17:30:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:09,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:09,429 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:09,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:09,629 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-07-09 17:30:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:09,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10798680] [2021-07-09 17:30:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10798680] [2021-07-09 17:30:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10798680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969066497] [2021-07-09 17:30:09,706 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 17:30:09,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:30:09,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969066497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:09,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022796951] [2021-07-09 17:30:09,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:09,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:09,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:09,778 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:09,956 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-07-09 17:30:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:09,964 INFO L225 Difference]: With dead ends: 4999 [2021-07-09 17:30:09,964 INFO L226 Difference]: Without dead ends: 4996 [2021-07-09 17:30:09,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-07-09 17:30:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-07-09 17:30:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-07-09 17:30:10,050 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-07-09 17:30:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:10,050 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-07-09 17:30:10,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-07-09 17:30:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:10,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:10,055 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:10,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-07-09 17:30:10,255 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:10,256 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-07-09 17:30:10,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:10,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392466885] [2021-07-09 17:30:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:10,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392466885] [2021-07-09 17:30:10,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392466885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223553184] [2021-07-09 17:30:10,361 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 17:30:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:10,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223553184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:10,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093244699] [2021-07-09 17:30:10,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:10,444 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:10,573 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-07-09 17:30:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:10,592 INFO L225 Difference]: With dead ends: 8484 [2021-07-09 17:30:10,592 INFO L226 Difference]: Without dead ends: 8484 [2021-07-09 17:30:10,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-07-09 17:30:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-07-09 17:30:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-07-09 17:30:10,757 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-07-09 17:30:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:10,757 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-07-09 17:30:10,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-07-09 17:30:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:10,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:10,762 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:10,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,986 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-07-09 17:30:10,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:10,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931126901] [2021-07-09 17:30:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:11,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931126901] [2021-07-09 17:30:11,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931126901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626074114] [2021-07-09 17:30:11,059 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 17:30:11,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626074114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:11,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:11,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162524364] [2021-07-09 17:30:11,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:11,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:11,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:11,128 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:11,333 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-07-09 17:30:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:11,354 INFO L225 Difference]: With dead ends: 8250 [2021-07-09 17:30:11,355 INFO L226 Difference]: Without dead ends: 8246 [2021-07-09 17:30:11,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-07-09 17:30:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-07-09 17:30:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-07-09 17:30:11,535 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-07-09 17:30:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:11,535 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-07-09 17:30:11,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-07-09 17:30:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:11,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:11,540 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:11,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:11,741 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-07-09 17:30:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:11,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195952296] [2021-07-09 17:30:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:11,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195952296] [2021-07-09 17:30:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195952296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339878939] [2021-07-09 17:30:11,812 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 17:30:11,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339878939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958073447] [2021-07-09 17:30:11,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:11,889 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,099 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-07-09 17:30:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,129 INFO L225 Difference]: With dead ends: 11106 [2021-07-09 17:30:12,130 INFO L226 Difference]: Without dead ends: 11106 [2021-07-09 17:30:12,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-07-09 17:30:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-07-09 17:30:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-07-09 17:30:12,378 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-07-09 17:30:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:12,379 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-07-09 17:30:12,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-07-09 17:30:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:12,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:12,384 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:12,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-07-09 17:30:12,585 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-07-09 17:30:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476214509] [2021-07-09 17:30:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476214509] [2021-07-09 17:30:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476214509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428904250] [2021-07-09 17:30:12,669 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 17:30:12,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:12,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:12,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428904250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:12,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:12,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319607449] [2021-07-09 17:30:12,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:12,739 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,936 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-07-09 17:30:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,958 INFO L225 Difference]: With dead ends: 10860 [2021-07-09 17:30:12,959 INFO L226 Difference]: Without dead ends: 10855 [2021-07-09 17:30:12,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-07-09 17:30:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-07-09 17:30:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-07-09 17:30:13,154 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-07-09 17:30:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,154 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-07-09 17:30:13,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-07-09 17:30:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:13,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,160 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-07-09 17:30:13,360 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-07-09 17:30:13,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135759881] [2021-07-09 17:30:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135759881] [2021-07-09 17:30:13,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135759881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131446419] [2021-07-09 17:30:13,436 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 17:30:13,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131446419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:30:13,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019594140] [2021-07-09 17:30:13,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:13,513 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,761 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-07-09 17:30:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:13,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,799 INFO L225 Difference]: With dead ends: 13741 [2021-07-09 17:30:13,799 INFO L226 Difference]: Without dead ends: 13741 [2021-07-09 17:30:13,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-07-09 17:30:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-07-09 17:30:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-07-09 17:30:14,093 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-07-09 17:30:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,093 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-07-09 17:30:14,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-07-09 17:30:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:14,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,099 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:14,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,300 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-07-09 17:30:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:14,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512472818] [2021-07-09 17:30:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512472818] [2021-07-09 17:30:14,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512472818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320782615] [2021-07-09 17:30:14,369 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 17:30:14,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320782615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688258343] [2021-07-09 17:30:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:14,446 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 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 17:30:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,604 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-07-09 17:30:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:14,604 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 22 [2021-07-09 17:30:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,636 INFO L225 Difference]: With dead ends: 13222 [2021-07-09 17:30:14,636 INFO L226 Difference]: Without dead ends: 13222 [2021-07-09 17:30:14,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-07-09 17:30:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-07-09 17:30:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-07-09 17:30:14,903 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-07-09 17:30:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,903 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-07-09 17:30:14,903 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 17:30:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-07-09 17:30:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:14,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,909 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-07-09 17:30:15,110 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,110 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-07-09 17:30:15,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596672430] [2021-07-09 17:30:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596672430] [2021-07-09 17:30:15,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596672430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080494604] [2021-07-09 17:30:15,172 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 17:30:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:15,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080494604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:15,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694797333] [2021-07-09 17:30:15,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:15,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:15,331 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 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 17:30:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:15,566 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-07-09 17:30:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:15,566 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 22 [2021-07-09 17:30:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:15,602 INFO L225 Difference]: With dead ends: 13713 [2021-07-09 17:30:15,602 INFO L226 Difference]: Without dead ends: 13711 [2021-07-09 17:30:15,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-07-09 17:30:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-07-09 17:30:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-07-09 17:30:15,923 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-07-09 17:30:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:15,923 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-07-09 17:30:15,923 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 17:30:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-07-09 17:30:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:15,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:15,930 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,130 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-07-09 17:30:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977052077] [2021-07-09 17:30:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:16,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977052077] [2021-07-09 17:30:16,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977052077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310520656] [2021-07-09 17:30:16,198 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 17:30:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310520656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:16,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:16,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773068973] [2021-07-09 17:30:16,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:16,260 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 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 17:30:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,483 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-07-09 17:30:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:16,484 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 22 [2021-07-09 17:30:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,523 INFO L225 Difference]: With dead ends: 13655 [2021-07-09 17:30:16,523 INFO L226 Difference]: Without dead ends: 13653 [2021-07-09 17:30:16,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-07-09 17:30:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-07-09 17:30:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-07-09 17:30:16,819 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-07-09 17:30:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,819 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-07-09 17:30:16,819 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 17:30:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-07-09 17:30:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:16,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,825 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:17,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-07-09 17:30:17,026 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-07-09 17:30:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:17,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991124589] [2021-07-09 17:30:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:17,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:17,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991124589] [2021-07-09 17:30:17,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991124589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995320697] [2021-07-09 17:30:17,104 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 17:30:17,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995320697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:17,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025569685] [2021-07-09 17:30:17,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:17,174 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 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 17:30:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:17,295 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-07-09 17:30:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:17,296 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 22 [2021-07-09 17:30:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:17,332 INFO L225 Difference]: With dead ends: 13677 [2021-07-09 17:30:17,332 INFO L226 Difference]: Without dead ends: 13677 [2021-07-09 17:30:17,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-07-09 17:30:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-07-09 17:30:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-07-09 17:30:17,628 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-07-09 17:30:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:17,628 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-07-09 17:30:17,628 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 17:30:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-07-09 17:30:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:17,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:17,634 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:17,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-07-09 17:30:17,837 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-07-09 17:30:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:17,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626147032] [2021-07-09 17:30:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:17,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626147032] [2021-07-09 17:30:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626147032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582288841] [2021-07-09 17:30:17,934 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 17:30:17,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582288841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:18,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:18,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436193501] [2021-07-09 17:30:18,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:18,003 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:18,230 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-07-09 17:30:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:30:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:18,269 INFO L225 Difference]: With dead ends: 13337 [2021-07-09 17:30:18,269 INFO L226 Difference]: Without dead ends: 13335 [2021-07-09 17:30:18,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-07-09 17:30:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-07-09 17:30:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-07-09 17:30:18,624 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-07-09 17:30:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:18,624 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-07-09 17:30:18,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-07-09 17:30:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:18,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:18,630 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,833 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-07-09 17:30:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285922627] [2021-07-09 17:30:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:18,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285922627] [2021-07-09 17:30:18,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285922627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505131940] [2021-07-09 17:30:18,902 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 17:30:18,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505131940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:18,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:18,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428849171] [2021-07-09 17:30:18,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:18,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:18,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:18,973 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,110 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-07-09 17:30:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:19,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:19,145 INFO L225 Difference]: With dead ends: 14025 [2021-07-09 17:30:19,145 INFO L226 Difference]: Without dead ends: 14025 [2021-07-09 17:30:19,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-07-09 17:30:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-07-09 17:30:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-07-09 17:30:19,422 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-07-09 17:30:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:19,422 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-07-09 17:30:19,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-07-09 17:30:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:19,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:19,428 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:19,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:19,629 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-07-09 17:30:19,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:19,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608383380] [2021-07-09 17:30:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608383380] [2021-07-09 17:30:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608383380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22364941] [2021-07-09 17:30:19,703 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 17:30:19,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:19,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22364941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:19,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:19,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052917584] [2021-07-09 17:30:19,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:19,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:19,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:19,773 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,998 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-07-09 17:30:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:30:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:20,028 INFO L225 Difference]: With dead ends: 13344 [2021-07-09 17:30:20,029 INFO L226 Difference]: Without dead ends: 13341 [2021-07-09 17:30:20,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-07-09 17:30:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-07-09 17:30:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-07-09 17:30:20,290 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-07-09 17:30:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:20,290 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-07-09 17:30:20,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-07-09 17:30:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:20,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:20,296 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:20,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-07-09 17:30:20,497 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-07-09 17:30:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:20,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384608402] [2021-07-09 17:30:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384608402] [2021-07-09 17:30:20,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384608402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237029687] [2021-07-09 17:30:20,565 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 17:30:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237029687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:20,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:20,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316857006] [2021-07-09 17:30:20,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:20,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:20,639 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:20,825 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-07-09 17:30:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:20,885 INFO L225 Difference]: With dead ends: 23387 [2021-07-09 17:30:20,886 INFO L226 Difference]: Without dead ends: 23387 [2021-07-09 17:30:20,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-07-09 17:30:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-07-09 17:30:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-07-09 17:30:21,543 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-07-09 17:30:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:21,543 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-07-09 17:30:21,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-07-09 17:30:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:21,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:21,551 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-07-09 17:30:21,751 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-07-09 17:30:21,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167366349] [2021-07-09 17:30:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167366349] [2021-07-09 17:30:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167366349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215351203] [2021-07-09 17:30:21,828 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 17:30:21,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215351203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:21,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363237890] [2021-07-09 17:30:21,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:21,889 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:22,169 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-07-09 17:30:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:22,240 INFO L225 Difference]: With dead ends: 23234 [2021-07-09 17:30:22,240 INFO L226 Difference]: Without dead ends: 23230 [2021-07-09 17:30:22,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-07-09 17:30:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-07-09 17:30:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-07-09 17:30:22,789 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-07-09 17:30:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:22,789 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-07-09 17:30:22,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-07-09 17:30:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:22,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:22,795 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:22,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:22,996 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-07-09 17:30:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:22,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728660360] [2021-07-09 17:30:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728660360] [2021-07-09 17:30:23,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728660360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560605782] [2021-07-09 17:30:23,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:30:23,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:23,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560605782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:23,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:23,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440140331] [2021-07-09 17:30:23,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:23,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:23,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:23,159 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,461 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-07-09 17:30:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,567 INFO L225 Difference]: With dead ends: 28918 [2021-07-09 17:30:23,567 INFO L226 Difference]: Without dead ends: 28918 [2021-07-09 17:30:23,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-07-09 17:30:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-07-09 17:30:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-07-09 17:30:24,476 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-07-09 17:30:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:24,476 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-07-09 17:30:24,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-07-09 17:30:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:24,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:24,483 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:24,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:24,684 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-07-09 17:30:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:24,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674066457] [2021-07-09 17:30:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674066457] [2021-07-09 17:30:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674066457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792777204] [2021-07-09 17:30:24,763 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 17:30:24,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:24,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792777204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:24,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:24,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632408422] [2021-07-09 17:30:24,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:24,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:24,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:24,841 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:25,150 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-07-09 17:30:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:25,250 INFO L225 Difference]: With dead ends: 28872 [2021-07-09 17:30:25,250 INFO L226 Difference]: Without dead ends: 28867 [2021-07-09 17:30:25,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-07-09 17:30:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-07-09 17:30:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-07-09 17:30:25,987 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-07-09 17:30:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:25,987 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-07-09 17:30:25,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-07-09 17:30:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:25,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:25,994 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-07-09 17:30:26,195 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-07-09 17:30:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596353007] [2021-07-09 17:30:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:26,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596353007] [2021-07-09 17:30:26,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596353007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162076589] [2021-07-09 17:30:26,278 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 17:30:26,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:26,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162076589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:26,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656190714] [2021-07-09 17:30:26,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:26,348 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:26,627 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-07-09 17:30:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:26,722 INFO L225 Difference]: With dead ends: 31093 [2021-07-09 17:30:26,722 INFO L226 Difference]: Without dead ends: 31093 [2021-07-09 17:30:26,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-07-09 17:30:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-07-09 17:30:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-07-09 17:30:27,617 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-07-09 17:30:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,617 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-07-09 17:30:27,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-07-09 17:30:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:27,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,624 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-07-09 17:30:27,825 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-07-09 17:30:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:27,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635180300] [2021-07-09 17:30:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635180300] [2021-07-09 17:30:27,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635180300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742297620] [2021-07-09 17:30:27,911 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 17:30:27,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742297620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:27,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376019915] [2021-07-09 17:30:27,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:27,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:27,976 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,291 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-07-09 17:30:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,382 INFO L225 Difference]: With dead ends: 31001 [2021-07-09 17:30:28,382 INFO L226 Difference]: Without dead ends: 30995 [2021-07-09 17:30:28,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-07-09 17:30:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-07-09 17:30:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-07-09 17:30:29,648 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-07-09 17:30:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,648 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-07-09 17:30:29,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-07-09 17:30:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:29,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,668 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-07-09 17:30:29,870 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,871 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-07-09 17:30:29,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397961180] [2021-07-09 17:30:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397961180] [2021-07-09 17:30:29,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397961180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716677063] [2021-07-09 17:30:29,978 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 17:30:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716677063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:30:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925456722] [2021-07-09 17:30:30,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:30,054 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:30,610 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-07-09 17:30:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:30:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:30,734 INFO L225 Difference]: With dead ends: 32605 [2021-07-09 17:30:30,734 INFO L226 Difference]: Without dead ends: 32605 [2021-07-09 17:30:30,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:30:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-07-09 17:30:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-07-09 17:30:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-07-09 17:30:31,763 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-07-09 17:30:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:31,763 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-07-09 17:30:31,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-07-09 17:30:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:31,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:31,773 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:31,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-07-09 17:30:31,989 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-07-09 17:30:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:31,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124291863] [2021-07-09 17:30:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:32,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:32,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124291863] [2021-07-09 17:30:32,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124291863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616326714] [2021-07-09 17:30:32,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:30:32,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:30:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616326714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:32,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614965829] [2021-07-09 17:30:32,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:32,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:32,111 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 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 17:30:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:32,470 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-07-09 17:30:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:32,470 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 17:30:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:32,727 INFO L225 Difference]: With dead ends: 32258 [2021-07-09 17:30:32,727 INFO L226 Difference]: Without dead ends: 32258 [2021-07-09 17:30:32,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-07-09 17:30:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-07-09 17:30:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-07-09 17:30:33,750 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-07-09 17:30:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:33,750 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-07-09 17:30:33,750 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 17:30:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-07-09 17:30:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:33,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:33,759 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:33,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-07-09 17:30:33,969 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:33,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-07-09 17:30:33,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:33,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765309207] [2021-07-09 17:30:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:34,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765309207] [2021-07-09 17:30:34,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765309207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108986216] [2021-07-09 17:30:34,020 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 17:30:34,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:30:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:30:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108986216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:34,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:30:34,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017401071] [2021-07-09 17:30:34,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:30:34,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:30:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:34,084 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 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 17:30:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,593 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-07-09 17:30:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:34,594 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 17:30:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,710 INFO L225 Difference]: With dead ends: 36772 [2021-07-09 17:30:34,710 INFO L226 Difference]: Without dead ends: 36768 [2021-07-09 17:30:34,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-07-09 17:30:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-07-09 17:30:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-07-09 17:30:35,992 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-07-09 17:30:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:35,992 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-07-09 17:30:35,992 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 17:30:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-07-09 17:30:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:36,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:36,001 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:36,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-07-09 17:30:36,201 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:36,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-07-09 17:30:36,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:36,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15695947] [2021-07-09 17:30:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:36,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15695947] [2021-07-09 17:30:36,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15695947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362250418] [2021-07-09 17:30:36,257 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 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 17:30:36,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:36,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362250418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:36,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:36,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347446176] [2021-07-09 17:30:36,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:36,318 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 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 17:30:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:36,825 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-07-09 17:30:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:36,825 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 17:30:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:36,970 INFO L225 Difference]: With dead ends: 36756 [2021-07-09 17:30:36,971 INFO L226 Difference]: Without dead ends: 36753 [2021-07-09 17:30:36,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-07-09 17:30:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-07-09 17:30:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-07-09 17:30:38,159 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-07-09 17:30:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:38,159 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-07-09 17:30:38,159 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 17:30:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-07-09 17:30:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:38,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:38,167 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-07-09 17:30:38,368 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-07-09 17:30:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:38,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595642586] [2021-07-09 17:30:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:38,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595642586] [2021-07-09 17:30:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595642586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851251328] [2021-07-09 17:30:38,421 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 17:30:38,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:38,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:38,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851251328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:30:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480383646] [2021-07-09 17:30:38,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:38,489 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 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 17:30:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:38,968 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-07-09 17:30:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:38,969 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 17:30:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,088 INFO L225 Difference]: With dead ends: 38596 [2021-07-09 17:30:39,089 INFO L226 Difference]: Without dead ends: 38596 [2021-07-09 17:30:39,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-07-09 17:30:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-07-09 17:30:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-07-09 17:30:40,394 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-07-09 17:30:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:40,394 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-07-09 17:30:40,394 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 17:30:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-07-09 17:30:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:40,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:40,402 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:40,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:40,603 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-07-09 17:30:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970343913] [2021-07-09 17:30:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:40,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:40,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970343913] [2021-07-09 17:30:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970343913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723937484] [2021-07-09 17:30:40,663 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 17:30:40,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:30:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723937484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146795580] [2021-07-09 17:30:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:40,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:40,733 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,262 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-07-09 17:30:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:41,263 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 17:30:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,397 INFO L225 Difference]: With dead ends: 38447 [2021-07-09 17:30:41,397 INFO L226 Difference]: Without dead ends: 38444 [2021-07-09 17:30:41,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-07-09 17:30:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-07-09 17:30:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-07-09 17:30:42,717 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-07-09 17:30:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:42,717 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-07-09 17:30:42,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-07-09 17:30:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:42,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:42,727 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:42,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,935 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-07-09 17:30:42,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:42,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964705822] [2021-07-09 17:30:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:42,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:42,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964705822] [2021-07-09 17:30:42,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964705822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499233740] [2021-07-09 17:30:42,999 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 17:30:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499233740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942728698] [2021-07-09 17:30:43,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:43,073 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,629 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-07-09 17:30:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:30:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,797 INFO L225 Difference]: With dead ends: 47743 [2021-07-09 17:30:43,797 INFO L226 Difference]: Without dead ends: 47743 [2021-07-09 17:30:43,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-07-09 17:30:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-07-09 17:30:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-07-09 17:30:45,460 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-07-09 17:30:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,460 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-07-09 17:30:45,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-07-09 17:30:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:45,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,469 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:45,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,670 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-07-09 17:30:45,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:45,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677158284] [2021-07-09 17:30:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:45,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677158284] [2021-07-09 17:30:45,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677158284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510787385] [2021-07-09 17:30:45,742 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 17:30:45,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:45,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510787385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:45,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925099491] [2021-07-09 17:30:45,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:45,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:45,808 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,490 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-07-09 17:30:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:46,490 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 17:30:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,669 INFO L225 Difference]: With dead ends: 46705 [2021-07-09 17:30:46,669 INFO L226 Difference]: Without dead ends: 46701 [2021-07-09 17:30:46,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-07-09 17:30:47,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-07-09 17:30:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-07-09 17:30:48,022 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-07-09 17:30:48,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:48,022 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-07-09 17:30:48,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-07-09 17:30:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:48,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:48,030 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,231 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-07-09 17:30:48,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959040921] [2021-07-09 17:30:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:48,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959040921] [2021-07-09 17:30:48,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959040921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43513709] [2021-07-09 17:30:48,342 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 17:30:48,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:48,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:30:48,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43513709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:30:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051318997] [2021-07-09 17:30:48,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:48,445 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,426 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-07-09 17:30:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:49,426 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 17:30:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,671 INFO L225 Difference]: With dead ends: 49378 [2021-07-09 17:30:49,671 INFO L226 Difference]: Without dead ends: 49378 [2021-07-09 17:30:49,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-07-09 17:30:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-07-09 17:30:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-07-09 17:30:51,746 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-07-09 17:30:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,746 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-07-09 17:30:51,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-07-09 17:30:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:51,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,757 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-07-09 17:30:51,973 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-07-09 17:30:51,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122959716] [2021-07-09 17:30:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122959716] [2021-07-09 17:30:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122959716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862679810] [2021-07-09 17:30:52,057 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 17:30:52,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:52,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862679810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:52,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209213108] [2021-07-09 17:30:52,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:52,139 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,677 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-07-09 17:30:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:52,678 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 17:30:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,143 INFO L225 Difference]: With dead ends: 49336 [2021-07-09 17:30:53,143 INFO L226 Difference]: Without dead ends: 49333 [2021-07-09 17:30:53,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-07-09 17:30:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-07-09 17:30:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-07-09 17:30:54,672 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-07-09 17:30:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,672 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-07-09 17:30:54,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-07-09 17:30:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:54,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,680 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,885 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-07-09 17:30:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62073710] [2021-07-09 17:30:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62073710] [2021-07-09 17:30:54,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62073710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666906302] [2021-07-09 17:30:54,950 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 17:30:54,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:30:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666906302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106133965] [2021-07-09 17:30:55,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:55,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:55,024 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,688 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-07-09 17:30:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:55,688 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 17:30:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,907 INFO L225 Difference]: With dead ends: 55383 [2021-07-09 17:30:55,907 INFO L226 Difference]: Without dead ends: 55383 [2021-07-09 17:30:55,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-07-09 17:30:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-07-09 17:30:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-07-09 17:30:57,521 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-07-09 17:30:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,521 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-07-09 17:30:57,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-07-09 17:30:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:57,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,529 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-07-09 17:30:57,729 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-07-09 17:30:57,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432380788] [2021-07-09 17:30:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432380788] [2021-07-09 17:30:57,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432380788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094295576] [2021-07-09 17:30:57,812 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 17:30:57,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:57,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094295576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:30:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664481393] [2021-07-09 17:30:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:57,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:57,882 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,557 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-07-09 17:30:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:30:58,557 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 17:30:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,715 INFO L225 Difference]: With dead ends: 46465 [2021-07-09 17:30:58,715 INFO L226 Difference]: Without dead ends: 46461 [2021-07-09 17:30:58,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-07-09 17:31:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-07-09 17:31:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-07-09 17:31:00,238 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-07-09 17:31:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,238 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-07-09 17:31:00,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-07-09 17:31:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:00,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,246 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-07-09 17:31:00,447 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-07-09 17:31:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147548871] [2021-07-09 17:31:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147548871] [2021-07-09 17:31:00,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147548871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675701053] [2021-07-09 17:31:00,512 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 17:31:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:00,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675701053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812221592] [2021-07-09 17:31:00,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:00,578 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:01,231 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-07-09 17:31:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:01,232 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 17:31:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:01,428 INFO L225 Difference]: With dead ends: 53081 [2021-07-09 17:31:01,428 INFO L226 Difference]: Without dead ends: 53081 [2021-07-09 17:31:01,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-07-09 17:31:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-07-09 17:31:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-07-09 17:31:03,415 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-07-09 17:31:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,415 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-07-09 17:31:03,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-07-09 17:31:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:03,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,434 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-07-09 17:31:03,671 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-07-09 17:31:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196501388] [2021-07-09 17:31:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196501388] [2021-07-09 17:31:03,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196501388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255346037] [2021-07-09 17:31:03,758 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 17:31:03,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:03,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255346037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:03,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257208201] [2021-07-09 17:31:03,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:03,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:03,852 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,328 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-07-09 17:31:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:04,328 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 17:31:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,498 INFO L225 Difference]: With dead ends: 50456 [2021-07-09 17:31:04,498 INFO L226 Difference]: Without dead ends: 50451 [2021-07-09 17:31:04,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-07-09 17:31:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-07-09 17:31:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-07-09 17:31:06,304 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-07-09 17:31:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,304 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-07-09 17:31:06,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-07-09 17:31:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:06,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,314 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-07-09 17:31:06,515 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-07-09 17:31:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77432990] [2021-07-09 17:31:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77432990] [2021-07-09 17:31:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77432990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875361520] [2021-07-09 17:31:06,581 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 17:31:06,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:31:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:06,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875361520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:06,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506148703] [2021-07-09 17:31:06,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:06,649 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,407 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-07-09 17:31:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:07,407 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 17:31:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,605 INFO L225 Difference]: With dead ends: 51683 [2021-07-09 17:31:07,606 INFO L226 Difference]: Without dead ends: 51683 [2021-07-09 17:31:07,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-07-09 17:31:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-07-09 17:31:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-07-09 17:31:09,203 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-07-09 17:31:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,203 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-07-09 17:31:09,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-07-09 17:31:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:09,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,211 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-07-09 17:31:09,411 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-07-09 17:31:09,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762890502] [2021-07-09 17:31:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762890502] [2021-07-09 17:31:09,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762890502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299740986] [2021-07-09 17:31:09,483 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 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 17:31:09,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:09,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299740986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:09,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60465102] [2021-07-09 17:31:09,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:09,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:09,554 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,248 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-07-09 17:31:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,438 INFO L225 Difference]: With dead ends: 51540 [2021-07-09 17:31:10,438 INFO L226 Difference]: Without dead ends: 51537 [2021-07-09 17:31:10,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-07-09 17:31:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-07-09 17:31:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-07-09 17:31:12,332 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-07-09 17:31:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,333 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-07-09 17:31:12,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-07-09 17:31:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:12,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,341 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-07-09 17:31:12,541 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,547 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-07-09 17:31:12,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322437444] [2021-07-09 17:31:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322437444] [2021-07-09 17:31:12,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322437444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178899390] [2021-07-09 17:31:12,870 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 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 17:31:12,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:12,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178899390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:12,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793020590] [2021-07-09 17:31:12,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:12,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:12,956 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,430 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-07-09 17:31:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,628 INFO L225 Difference]: With dead ends: 54243 [2021-07-09 17:31:13,628 INFO L226 Difference]: Without dead ends: 54243 [2021-07-09 17:31:13,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-07-09 17:31:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-07-09 17:31:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-07-09 17:31:14,849 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-07-09 17:31:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,849 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-07-09 17:31:14,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-07-09 17:31:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:14,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,857 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:15,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,057 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-07-09 17:31:15,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:15,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045437627] [2021-07-09 17:31:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045437627] [2021-07-09 17:31:15,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045437627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231019984] [2021-07-09 17:31:15,130 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 17:31:15,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:31:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231019984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:15,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741776864] [2021-07-09 17:31:15,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:15,193 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:15,482 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-07-09 17:31:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:15,533 INFO L225 Difference]: With dead ends: 20359 [2021-07-09 17:31:15,533 INFO L226 Difference]: Without dead ends: 20355 [2021-07-09 17:31:15,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-07-09 17:31:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-07-09 17:31:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-07-09 17:31:16,100 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-07-09 17:31:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,100 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-07-09 17:31:16,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-07-09 17:31:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:16,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,108 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,308 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-07-09 17:31:16,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053434736] [2021-07-09 17:31:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053434736] [2021-07-09 17:31:16,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053434736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81781218] [2021-07-09 17:31:16,376 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 17:31:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81781218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475300247] [2021-07-09 17:31:16,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:16,442 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,815 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-07-09 17:31:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,901 INFO L225 Difference]: With dead ends: 28252 [2021-07-09 17:31:16,901 INFO L226 Difference]: Without dead ends: 28252 [2021-07-09 17:31:16,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-07-09 17:31:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-07-09 17:31:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-07-09 17:31:17,522 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-07-09 17:31:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-07-09 17:31:17,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-07-09 17:31:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:17,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,530 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,730 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-07-09 17:31:17,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019821807] [2021-07-09 17:31:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019821807] [2021-07-09 17:31:17,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019821807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494437395] [2021-07-09 17:31:17,803 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 17:31:17,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494437395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:17,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578856364] [2021-07-09 17:31:17,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:17,863 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,127 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-07-09 17:31:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,184 INFO L225 Difference]: With dead ends: 20123 [2021-07-09 17:31:18,184 INFO L226 Difference]: Without dead ends: 20118 [2021-07-09 17:31:18,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-07-09 17:31:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-07-09 17:31:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-07-09 17:31:18,746 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-07-09 17:31:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,746 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-07-09 17:31:18,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-07-09 17:31:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:18,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,753 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,954 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-07-09 17:31:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203943145] [2021-07-09 17:31:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203943145] [2021-07-09 17:31:19,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203943145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779883752] [2021-07-09 17:31:19,038 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 17:31:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:31:19,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779883752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961662820] [2021-07-09 17:31:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:19,112 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:19,499 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-07-09 17:31:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:19,563 INFO L225 Difference]: With dead ends: 21427 [2021-07-09 17:31:19,564 INFO L226 Difference]: Without dead ends: 21427 [2021-07-09 17:31:19,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-07-09 17:31:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-07-09 17:31:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-07-09 17:31:20,162 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-07-09 17:31:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,162 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-07-09 17:31:20,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-07-09 17:31:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:20,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,170 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-07-09 17:31:20,370 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-07-09 17:31:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399034264] [2021-07-09 17:31:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:20,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399034264] [2021-07-09 17:31:20,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399034264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303823225] [2021-07-09 17:31:20,458 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 17:31:20,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:20,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303823225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:20,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:20,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792554164] [2021-07-09 17:31:20,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:20,518 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,793 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-07-09 17:31:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:31:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,845 INFO L225 Difference]: With dead ends: 20188 [2021-07-09 17:31:20,845 INFO L226 Difference]: Without dead ends: 20182 [2021-07-09 17:31:20,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-07-09 17:31:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-07-09 17:31:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-07-09 17:31:21,390 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-07-09 17:31:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,390 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-07-09 17:31:21,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-07-09 17:31:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:21,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,397 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,597 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-07-09 17:31:21,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990964212] [2021-07-09 17:31:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990964212] [2021-07-09 17:31:21,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990964212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067865390] [2021-07-09 17:31:21,672 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 17:31:21,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:21,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067865390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742309626] [2021-07-09 17:31:21,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:21,740 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,184 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-07-09 17:31:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:31:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,234 INFO L225 Difference]: With dead ends: 20611 [2021-07-09 17:31:22,234 INFO L226 Difference]: Without dead ends: 20611 [2021-07-09 17:31:22,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:31:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-07-09 17:31:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-07-09 17:31:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-07-09 17:31:22,812 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-07-09 17:31:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,812 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-07-09 17:31:22,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-07-09 17:31:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:22,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,818 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-07-09 17:31:23,019 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,019 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-07-09 17:31:23,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241647156] [2021-07-09 17:31:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241647156] [2021-07-09 17:31:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241647156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221218290] [2021-07-09 17:31:23,083 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 17:31:23,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:31:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:23,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221218290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:23,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348581257] [2021-07-09 17:31:23,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:23,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:23,171 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 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 17:31:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,389 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-07-09 17:31:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:23,389 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 22 [2021-07-09 17:31:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,437 INFO L225 Difference]: With dead ends: 19840 [2021-07-09 17:31:23,437 INFO L226 Difference]: Without dead ends: 19840 [2021-07-09 17:31:23,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-07-09 17:31:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-07-09 17:31:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-07-09 17:31:23,980 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-07-09 17:31:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-07-09 17:31:23,981 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 17:31:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-07-09 17:31:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:23,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,988 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-07-09 17:31:24,188 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-07-09 17:31:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656342139] [2021-07-09 17:31:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656342139] [2021-07-09 17:31:24,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656342139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238750655] [2021-07-09 17:31:24,248 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 17:31:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:24,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238750655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:24,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244266477] [2021-07-09 17:31:24,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:24,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:24,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:24,309 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 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 17:31:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,551 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-07-09 17:31:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:24,551 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 22 [2021-07-09 17:31:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,599 INFO L225 Difference]: With dead ends: 19868 [2021-07-09 17:31:24,600 INFO L226 Difference]: Without dead ends: 19864 [2021-07-09 17:31:24,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-07-09 17:31:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-07-09 17:31:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-07-09 17:31:25,127 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-07-09 17:31:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,127 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-07-09 17:31:25,127 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 17:31:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-07-09 17:31:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:25,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,133 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-07-09 17:31:25,334 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-07-09 17:31:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827377007] [2021-07-09 17:31:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827377007] [2021-07-09 17:31:25,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827377007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338812423] [2021-07-09 17:31:25,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:31:25,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:25,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:25,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338812423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506068999] [2021-07-09 17:31:25,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:25,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:25,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:25,464 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 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 17:31:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,794 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-07-09 17:31:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:25,795 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 22 [2021-07-09 17:31:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,838 INFO L225 Difference]: With dead ends: 18321 [2021-07-09 17:31:25,838 INFO L226 Difference]: Without dead ends: 18320 [2021-07-09 17:31:25,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-07-09 17:31:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-07-09 17:31:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-07-09 17:31:26,340 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-07-09 17:31:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,340 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-07-09 17:31:26,341 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 17:31:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-07-09 17:31:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:26,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,347 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-07-09 17:31:26,548 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-07-09 17:31:26,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386419139] [2021-07-09 17:31:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386419139] [2021-07-09 17:31:26,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386419139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030923365] [2021-07-09 17:31:26,609 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 17:31:26,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030923365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:26,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690789069] [2021-07-09 17:31:26,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:26,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:26,675 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 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 17:31:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:26,810 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-07-09 17:31:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:26,810 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 22 [2021-07-09 17:31:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:26,851 INFO L225 Difference]: With dead ends: 18502 [2021-07-09 17:31:26,852 INFO L226 Difference]: Without dead ends: 18502 [2021-07-09 17:31:26,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-07-09 17:31:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-07-09 17:31:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-07-09 17:31:27,351 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-07-09 17:31:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,351 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-07-09 17:31:27,351 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 17:31:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-07-09 17:31:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:27,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,359 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,582 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,582 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-07-09 17:31:27,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407572986] [2021-07-09 17:31:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:27,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407572986] [2021-07-09 17:31:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407572986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615285667] [2021-07-09 17:31:27,648 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 17:31:27,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615285667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:27,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:31:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031307898] [2021-07-09 17:31:27,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:27,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:27,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:27,714 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,962 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-07-09 17:31:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:31:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,006 INFO L225 Difference]: With dead ends: 18306 [2021-07-09 17:31:28,006 INFO L226 Difference]: Without dead ends: 18304 [2021-07-09 17:31:28,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-07-09 17:31:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-07-09 17:31:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-07-09 17:31:28,462 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-07-09 17:31:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,462 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-07-09 17:31:28,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-07-09 17:31:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:28,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,469 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,670 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-07-09 17:31:28,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191606953] [2021-07-09 17:31:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:28,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191606953] [2021-07-09 17:31:28,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191606953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984643450] [2021-07-09 17:31:28,750 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 17:31:28,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:28,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:28,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984643450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:31:28,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836897626] [2021-07-09 17:31:28,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:28,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:28,829 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,968 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-07-09 17:31:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:28,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,011 INFO L225 Difference]: With dead ends: 18305 [2021-07-09 17:31:29,011 INFO L226 Difference]: Without dead ends: 18305 [2021-07-09 17:31:29,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-07-09 17:31:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-07-09 17:31:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-07-09 17:31:29,492 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-07-09 17:31:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,492 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-07-09 17:31:29,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-07-09 17:31:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:29,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,499 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:29,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,699 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-07-09 17:31:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:29,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696270020] [2021-07-09 17:31:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696270020] [2021-07-09 17:31:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696270020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789279730] [2021-07-09 17:31:29,774 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 17:31:29,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:31:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789279730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321390793] [2021-07-09 17:31:29,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:29,842 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,114 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-07-09 17:31:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:31:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,159 INFO L225 Difference]: With dead ends: 17705 [2021-07-09 17:31:30,159 INFO L226 Difference]: Without dead ends: 17702 [2021-07-09 17:31:30,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-07-09 17:31:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-07-09 17:31:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-07-09 17:31:30,592 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-07-09 17:31:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,592 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-07-09 17:31:30,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-07-09 17:31:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:30,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,599 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,799 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-07-09 17:31:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018662873] [2021-07-09 17:31:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018662873] [2021-07-09 17:31:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018662873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536960956] [2021-07-09 17:31:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:31:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536960956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141034919] [2021-07-09 17:31:30,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:30,938 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,210 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-07-09 17:31:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,250 INFO L225 Difference]: With dead ends: 18492 [2021-07-09 17:31:31,250 INFO L226 Difference]: Without dead ends: 18492 [2021-07-09 17:31:31,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-07-09 17:31:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-07-09 17:31:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-07-09 17:31:31,586 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-07-09 17:31:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-07-09 17:31:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-07-09 17:31:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:31,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,592 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,793 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-07-09 17:31:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292370564] [2021-07-09 17:31:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292370564] [2021-07-09 17:31:31,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292370564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21279452] [2021-07-09 17:31:31,879 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 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 17:31:31,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21279452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:31,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031816059] [2021-07-09 17:31:31,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:31,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:31,946 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,319 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-07-09 17:31:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:31:32,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,358 INFO L225 Difference]: With dead ends: 18165 [2021-07-09 17:31:32,359 INFO L226 Difference]: Without dead ends: 18161 [2021-07-09 17:31:32,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-07-09 17:31:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-07-09 17:31:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-07-09 17:31:32,713 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-07-09 17:31:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,713 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-07-09 17:31:32,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-07-09 17:31:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:32,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,719 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,919 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-07-09 17:31:32,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54240737] [2021-07-09 17:31:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54240737] [2021-07-09 17:31:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54240737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618264874] [2021-07-09 17:31:32,989 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 17:31:33,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:31:33,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618264874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:33,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589057938] [2021-07-09 17:31:33,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:33,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:33,063 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,271 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-07-09 17:31:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,349 INFO L225 Difference]: With dead ends: 23520 [2021-07-09 17:31:33,350 INFO L226 Difference]: Without dead ends: 23520 [2021-07-09 17:31:33,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-07-09 17:31:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-07-09 17:31:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-07-09 17:31:33,857 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-07-09 17:31:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,857 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-07-09 17:31:33,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-07-09 17:31:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:33,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,863 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-07-09 17:31:34,064 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-07-09 17:31:34,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082320064] [2021-07-09 17:31:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082320064] [2021-07-09 17:31:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082320064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671931151] [2021-07-09 17:31:34,139 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 17:31:34,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:34,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671931151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:34,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866222151] [2021-07-09 17:31:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:34,207 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:34,483 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-07-09 17:31:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:31:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:34,531 INFO L225 Difference]: With dead ends: 19410 [2021-07-09 17:31:34,532 INFO L226 Difference]: Without dead ends: 19405 [2021-07-09 17:31:34,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-07-09 17:31:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-07-09 17:31:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-07-09 17:31:35,003 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-07-09 17:31:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,003 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-07-09 17:31:35,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-07-09 17:31:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:35,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,009 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-07-09 17:31:35,210 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-07-09 17:31:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132778034] [2021-07-09 17:31:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132778034] [2021-07-09 17:31:35,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132778034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417111850] [2021-07-09 17:31:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:31:35,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:31:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417111850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:35,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986387647] [2021-07-09 17:31:35,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:35,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:35,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:35,358 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,573 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-07-09 17:31:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,635 INFO L225 Difference]: With dead ends: 20745 [2021-07-09 17:31:35,635 INFO L226 Difference]: Without dead ends: 20745 [2021-07-09 17:31:35,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-07-09 17:31:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-07-09 17:31:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-07-09 17:31:36,155 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-07-09 17:31:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,155 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-07-09 17:31:36,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-07-09 17:31:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,162 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:36,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-07-09 17:31:36,362 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-07-09 17:31:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:36,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453310776] [2021-07-09 17:31:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453310776] [2021-07-09 17:31:36,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453310776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198239181] [2021-07-09 17:31:36,442 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 17:31:36,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:31:36,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:36,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198239181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:36,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908189457] [2021-07-09 17:31:36,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:36,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:36,515 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,793 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-07-09 17:31:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,841 INFO L225 Difference]: With dead ends: 20239 [2021-07-09 17:31:36,841 INFO L226 Difference]: Without dead ends: 20233 [2021-07-09 17:31:36,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-07-09 17:31:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-07-09 17:31:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-07-09 17:31:37,464 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-07-09 17:31:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:37,464 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-07-09 17:31:37,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-07-09 17:31:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:37,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:37,471 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-07-09 17:31:37,672 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-07-09 17:31:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866419772] [2021-07-09 17:31:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866419772] [2021-07-09 17:31:37,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866419772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353830355] [2021-07-09 17:31:37,748 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 17:31:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353830355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:37,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:37,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639846139] [2021-07-09 17:31:37,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:37,820 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:38,113 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-07-09 17:31:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:38,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:38,172 INFO L225 Difference]: With dead ends: 20573 [2021-07-09 17:31:38,172 INFO L226 Difference]: Without dead ends: 20573 [2021-07-09 17:31:38,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:31:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-07-09 17:31:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-07-09 17:31:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-07-09 17:31:38,743 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-07-09 17:31:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:38,743 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-07-09 17:31:38,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-07-09 17:31:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:38,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:38,750 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:38,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-07-09 17:31:38,951 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-07-09 17:31:38,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:38,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924803027] [2021-07-09 17:31:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924803027] [2021-07-09 17:31:39,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924803027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455366682] [2021-07-09 17:31:39,040 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 17:31:39,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455366682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:39,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696725414] [2021-07-09 17:31:39,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:39,129 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,534 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-07-09 17:31:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,594 INFO L225 Difference]: With dead ends: 20348 [2021-07-09 17:31:39,594 INFO L226 Difference]: Without dead ends: 20341 [2021-07-09 17:31:39,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-07-09 17:31:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-07-09 17:31:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-07-09 17:31:40,035 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-07-09 17:31:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:40,035 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-07-09 17:31:40,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-07-09 17:31:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:40,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:40,042 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:40,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:40,242 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:40,243 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-07-09 17:31:40,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:40,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873515339] [2021-07-09 17:31:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:40,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873515339] [2021-07-09 17:31:40,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873515339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020763830] [2021-07-09 17:31:40,434 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 17:31:40,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:40,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020763830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:31:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199213933] [2021-07-09 17:31:40,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:40,507 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:40,919 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-07-09 17:31:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:31:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:40,974 INFO L225 Difference]: With dead ends: 21105 [2021-07-09 17:31:40,975 INFO L226 Difference]: Without dead ends: 21105 [2021-07-09 17:31:40,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:31:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-07-09 17:31:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-07-09 17:31:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-07-09 17:31:41,502 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-07-09 17:31:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:41,502 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-07-09 17:31:41,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-07-09 17:31:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:41,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:41,509 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:41,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,709 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-07-09 17:31:41,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:41,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836958917] [2021-07-09 17:31:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:41,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836958917] [2021-07-09 17:31:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836958917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628927958] [2021-07-09 17:31:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:31:41,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:41,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628927958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:41,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:41,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329341952] [2021-07-09 17:31:41,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:41,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:41,846 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 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 17:31:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:42,032 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-07-09 17:31:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:42,032 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 17:31:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:42,081 INFO L225 Difference]: With dead ends: 20897 [2021-07-09 17:31:42,081 INFO L226 Difference]: Without dead ends: 20897 [2021-07-09 17:31:42,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-07-09 17:31:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-07-09 17:31:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-07-09 17:31:42,629 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-07-09 17:31:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:42,629 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-07-09 17:31:42,629 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 17:31:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-07-09 17:31:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:42,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:42,636 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,837 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-07-09 17:31:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351091282] [2021-07-09 17:31:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:42,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351091282] [2021-07-09 17:31:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351091282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938035055] [2021-07-09 17:31:42,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:31:42,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:42,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:42,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938035055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:42,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:31:42,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736370732] [2021-07-09 17:31:42,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:42,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:42,950 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 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 17:31:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:43,441 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-07-09 17:31:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:43,442 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 17:31:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:43,515 INFO L225 Difference]: With dead ends: 25212 [2021-07-09 17:31:43,515 INFO L226 Difference]: Without dead ends: 25208 [2021-07-09 17:31:43,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-07-09 17:31:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-07-09 17:31:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-07-09 17:31:44,173 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-07-09 17:31:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:44,173 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-07-09 17:31:44,173 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 17:31:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-07-09 17:31:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:44,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:44,180 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:44,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:44,381 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-07-09 17:31:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:44,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483658180] [2021-07-09 17:31:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:44,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483658180] [2021-07-09 17:31:44,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483658180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375933283] [2021-07-09 17:31:44,464 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 17:31:44,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:31:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375933283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:44,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:44,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28955662] [2021-07-09 17:31:44,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:44,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:44,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:44,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:44,538 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 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 17:31:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:44,807 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-07-09 17:31:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:44,807 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 17:31:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:44,883 INFO L225 Difference]: With dead ends: 23865 [2021-07-09 17:31:44,883 INFO L226 Difference]: Without dead ends: 23861 [2021-07-09 17:31:44,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-07-09 17:31:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-07-09 17:31:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-07-09 17:31:45,626 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-07-09 17:31:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,626 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-07-09 17:31:45,626 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 17:31:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-07-09 17:31:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:45,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,633 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-07-09 17:31:45,833 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-07-09 17:31:45,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080872964] [2021-07-09 17:31:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:45,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080872964] [2021-07-09 17:31:45,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080872964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462520851] [2021-07-09 17:31:45,890 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 17:31:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462520851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:31:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362222869] [2021-07-09 17:31:45,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:45,955 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 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 17:31:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:46,308 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-07-09 17:31:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:46,308 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 17:31:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:46,383 INFO L225 Difference]: With dead ends: 26766 [2021-07-09 17:31:46,383 INFO L226 Difference]: Without dead ends: 26766 [2021-07-09 17:31:46,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-07-09 17:31:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-07-09 17:31:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-07-09 17:31:47,050 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-07-09 17:31:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:47,050 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-07-09 17:31:47,050 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 17:31:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-07-09 17:31:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:47,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:47,057 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:47,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-07-09 17:31:47,258 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-07-09 17:31:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:47,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3699439] [2021-07-09 17:31:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3699439] [2021-07-09 17:31:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3699439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311728624] [2021-07-09 17:31:47,324 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 17:31:47,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:47,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311728624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:47,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121926522] [2021-07-09 17:31:47,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:47,388 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:47,643 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-07-09 17:31:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:47,644 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 17:31:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:47,908 INFO L225 Difference]: With dead ends: 26395 [2021-07-09 17:31:47,909 INFO L226 Difference]: Without dead ends: 26391 [2021-07-09 17:31:47,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-07-09 17:31:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-07-09 17:31:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-07-09 17:31:48,615 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-07-09 17:31:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:48,615 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-07-09 17:31:48,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-07-09 17:31:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:48,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:48,623 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:48,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-07-09 17:31:48,824 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-07-09 17:31:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:48,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28655438] [2021-07-09 17:31:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28655438] [2021-07-09 17:31:48,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28655438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728437866] [2021-07-09 17:31:48,890 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 17:31:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:31:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728437866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:48,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202856231] [2021-07-09 17:31:48,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:48,958 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:49,219 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-07-09 17:31:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:49,219 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 17:31:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:49,300 INFO L225 Difference]: With dead ends: 28931 [2021-07-09 17:31:49,300 INFO L226 Difference]: Without dead ends: 28931 [2021-07-09 17:31:49,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-07-09 17:31:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-07-09 17:31:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-07-09 17:31:50,058 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-07-09 17:31:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:50,058 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-07-09 17:31:50,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-07-09 17:31:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:50,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:50,066 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:50,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-07-09 17:31:50,269 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-07-09 17:31:50,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:50,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134985205] [2021-07-09 17:31:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134985205] [2021-07-09 17:31:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134985205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363194334] [2021-07-09 17:31:50,463 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 17:31:50,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:50,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363194334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:50,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052657666] [2021-07-09 17:31:50,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:50,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:50,524 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:50,835 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-07-09 17:31:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:31:50,835 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 17:31:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:50,909 INFO L225 Difference]: With dead ends: 25641 [2021-07-09 17:31:50,910 INFO L226 Difference]: Without dead ends: 25636 [2021-07-09 17:31:50,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-07-09 17:31:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-07-09 17:31:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-07-09 17:31:51,582 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-07-09 17:31:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:51,582 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-07-09 17:31:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-07-09 17:31:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:51,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:51,590 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:51,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-07-09 17:31:51,791 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-07-09 17:31:51,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:51,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670700494] [2021-07-09 17:31:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:51,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670700494] [2021-07-09 17:31:51,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670700494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893904008] [2021-07-09 17:31:51,859 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 17:31:51,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:51,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:51,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893904008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:51,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:31:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611578565] [2021-07-09 17:31:51,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:51,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:51,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:51,926 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:52,358 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-07-09 17:31:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:52,359 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 17:31:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:52,440 INFO L225 Difference]: With dead ends: 28403 [2021-07-09 17:31:52,440 INFO L226 Difference]: Without dead ends: 28403 [2021-07-09 17:31:52,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-07-09 17:31:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-07-09 17:31:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-07-09 17:31:53,187 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-07-09 17:31:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:53,187 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-07-09 17:31:53,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-07-09 17:31:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:53,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:53,196 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:53,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-07-09 17:31:53,397 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-07-09 17:31:53,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491014917] [2021-07-09 17:31:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:53,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491014917] [2021-07-09 17:31:53,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491014917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258908910] [2021-07-09 17:31:53,466 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 17:31:53,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:31:53,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:53,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258908910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:53,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:53,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485237806] [2021-07-09 17:31:53,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:53,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:53,529 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,010 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-07-09 17:31:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,086 INFO L225 Difference]: With dead ends: 28254 [2021-07-09 17:31:54,086 INFO L226 Difference]: Without dead ends: 28250 [2021-07-09 17:31:54,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-07-09 17:31:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-07-09 17:31:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-07-09 17:31:54,815 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-07-09 17:31:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,816 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-07-09 17:31:54,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-07-09 17:31:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:54,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,824 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:55,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,025 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-07-09 17:31:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:55,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104780054] [2021-07-09 17:31:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:55,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104780054] [2021-07-09 17:31:55,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104780054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778961215] [2021-07-09 17:31:55,091 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 17:31:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778961215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:55,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755970269] [2021-07-09 17:31:55,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:55,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:55,159 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:55,462 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-07-09 17:31:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:55,537 INFO L225 Difference]: With dead ends: 30857 [2021-07-09 17:31:55,537 INFO L226 Difference]: Without dead ends: 30857 [2021-07-09 17:31:55,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-07-09 17:31:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-07-09 17:31:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-07-09 17:31:56,400 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-07-09 17:31:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:56,400 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-07-09 17:31:56,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-07-09 17:31:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:56,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:56,407 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:56,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-07-09 17:31:56,608 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-07-09 17:31:56,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:56,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750462616] [2021-07-09 17:31:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:56,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750462616] [2021-07-09 17:31:56,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750462616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403164955] [2021-07-09 17:31:56,680 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 17:31:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403164955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:56,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468575898] [2021-07-09 17:31:56,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:56,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:56,739 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:57,024 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-07-09 17:31:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:57,082 INFO L225 Difference]: With dead ends: 23497 [2021-07-09 17:31:57,082 INFO L226 Difference]: Without dead ends: 23492 [2021-07-09 17:31:57,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-07-09 17:31:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-07-09 17:31:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-07-09 17:31:57,664 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-07-09 17:31:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:57,664 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-07-09 17:31:57,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-07-09 17:31:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:57,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:57,672 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:57,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,872 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:57,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-07-09 17:31:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:57,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528183888] [2021-07-09 17:31:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528183888] [2021-07-09 17:31:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528183888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226399146] [2021-07-09 17:31:57,940 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 17:31:57,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:57,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226399146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662698513] [2021-07-09 17:31:58,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:58,006 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:58,401 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-07-09 17:31:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:58,481 INFO L225 Difference]: With dead ends: 26246 [2021-07-09 17:31:58,482 INFO L226 Difference]: Without dead ends: 26246 [2021-07-09 17:31:58,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-07-09 17:31:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-07-09 17:31:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-07-09 17:31:59,129 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-07-09 17:31:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-07-09 17:31:59,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-07-09 17:31:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:59,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:59,136 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:59,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,337 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-07-09 17:31:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:59,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468273228] [2021-07-09 17:31:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468273228] [2021-07-09 17:31:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468273228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587382575] [2021-07-09 17:31:59,413 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 17:31:59,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:59,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:31:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587382575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:59,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:31:59,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952826324] [2021-07-09 17:31:59,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:59,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:59,472 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:59,767 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-07-09 17:31:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:31:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:59,824 INFO L225 Difference]: With dead ends: 23615 [2021-07-09 17:31:59,824 INFO L226 Difference]: Without dead ends: 23609 [2021-07-09 17:31:59,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-07-09 17:32:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-07-09 17:32:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-07-09 17:32:00,460 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-07-09 17:32:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:00,460 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-07-09 17:32:00,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-07-09 17:32:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:00,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:00,467 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:00,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:00,668 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-07-09 17:32:00,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:00,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073506667] [2021-07-09 17:32:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:00,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073506667] [2021-07-09 17:32:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073506667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875860922] [2021-07-09 17:32:00,741 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 17:32:00,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875860922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:00,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:32:00,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922025742] [2021-07-09 17:32:00,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:00,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:00,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:00,943 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:01,318 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-07-09 17:32:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:32:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:01,397 INFO L225 Difference]: With dead ends: 24953 [2021-07-09 17:32:01,398 INFO L226 Difference]: Without dead ends: 24953 [2021-07-09 17:32:01,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:32:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-07-09 17:32:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-07-09 17:32:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-07-09 17:32:02,019 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-07-09 17:32:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:02,019 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-07-09 17:32:02,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-07-09 17:32:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:02,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:02,026 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,227 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-07-09 17:32:02,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487520757] [2021-07-09 17:32:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487520757] [2021-07-09 17:32:02,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487520757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762103325] [2021-07-09 17:32:02,298 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 17:32:02,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:32:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762103325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:02,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865514621] [2021-07-09 17:32:02,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:02,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:02,367 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:02,794 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-07-09 17:32:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:02,871 INFO L225 Difference]: With dead ends: 24826 [2021-07-09 17:32:02,871 INFO L226 Difference]: Without dead ends: 24822 [2021-07-09 17:32:02,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-07-09 17:32:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-07-09 17:32:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-07-09 17:32:03,526 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-07-09 17:32:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,526 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-07-09 17:32:03,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-07-09 17:32:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:03,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,534 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:03,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-07-09 17:32:03,736 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-07-09 17:32:03,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:03,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18822171] [2021-07-09 17:32:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18822171] [2021-07-09 17:32:03,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18822171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661876970] [2021-07-09 17:32:03,814 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 17:32:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661876970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:03,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345602260] [2021-07-09 17:32:03,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:03,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:03,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:03,901 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:04,158 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-07-09 17:32:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:04,234 INFO L225 Difference]: With dead ends: 25900 [2021-07-09 17:32:04,235 INFO L226 Difference]: Without dead ends: 25900 [2021-07-09 17:32:04,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-07-09 17:32:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-07-09 17:32:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-07-09 17:32:04,831 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-07-09 17:32:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:04,832 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-07-09 17:32:04,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-07-09 17:32:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:04,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:04,839 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:05,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,040 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-07-09 17:32:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:05,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677418736] [2021-07-09 17:32:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677418736] [2021-07-09 17:32:05,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677418736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795740915] [2021-07-09 17:32:05,126 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 17:32:05,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795740915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:05,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:05,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967381342] [2021-07-09 17:32:05,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:05,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:05,196 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,643 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-07-09 17:32:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:32:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,692 INFO L225 Difference]: With dead ends: 19111 [2021-07-09 17:32:05,692 INFO L226 Difference]: Without dead ends: 19106 [2021-07-09 17:32:05,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-07-09 17:32:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-07-09 17:32:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-07-09 17:32:06,229 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-07-09 17:32:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-07-09 17:32:06,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-07-09 17:32:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:06,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:06,237 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:06,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-07-09 17:32:06,439 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-07-09 17:32:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:06,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850405502] [2021-07-09 17:32:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850405502] [2021-07-09 17:32:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850405502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107147252] [2021-07-09 17:32:06,507 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 17:32:06,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:32:06,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107147252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:06,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:06,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59332669] [2021-07-09 17:32:06,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:06,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:06,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:06,583 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:06,815 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-07-09 17:32:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:06,871 INFO L225 Difference]: With dead ends: 22104 [2021-07-09 17:32:06,871 INFO L226 Difference]: Without dead ends: 22104 [2021-07-09 17:32:06,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-07-09 17:32:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-07-09 17:32:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-07-09 17:32:07,377 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-07-09 17:32:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:07,377 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-07-09 17:32:07,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-07-09 17:32:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:07,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:07,383 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:07,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-07-09 17:32:07,584 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-07-09 17:32:07,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:07,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521206840] [2021-07-09 17:32:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521206840] [2021-07-09 17:32:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521206840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422371372] [2021-07-09 17:32:07,662 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 17:32:07,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422371372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:07,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811382529] [2021-07-09 17:32:07,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:07,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:07,731 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:08,035 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-07-09 17:32:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:08,084 INFO L225 Difference]: With dead ends: 18689 [2021-07-09 17:32:08,084 INFO L226 Difference]: Without dead ends: 18683 [2021-07-09 17:32:08,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-07-09 17:32:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-07-09 17:32:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-07-09 17:32:08,571 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-07-09 17:32:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:08,571 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-07-09 17:32:08,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-07-09 17:32:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:08,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:08,578 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:08,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,778 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-07-09 17:32:08,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:08,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632436467] [2021-07-09 17:32:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632436467] [2021-07-09 17:32:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632436467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180455274] [2021-07-09 17:32:08,850 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 17:32:08,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180455274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:08,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:08,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34225724] [2021-07-09 17:32:08,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:08,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:08,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:08,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:08,931 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:09,317 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-07-09 17:32:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:09,367 INFO L225 Difference]: With dead ends: 19170 [2021-07-09 17:32:09,367 INFO L226 Difference]: Without dead ends: 19170 [2021-07-09 17:32:09,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:32:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-07-09 17:32:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-07-09 17:32:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-07-09 17:32:09,761 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-07-09 17:32:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:09,761 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-07-09 17:32:09,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-07-09 17:32:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:09,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:09,768 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:09,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-07-09 17:32:09,968 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-07-09 17:32:09,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:09,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924171145] [2021-07-09 17:32:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:10,076 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 17:32:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:10,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924171145] [2021-07-09 17:32:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924171145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25540666] [2021-07-09 17:32:10,150 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 17:32:10,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:32:10,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25540666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:10,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:10,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617522724] [2021-07-09 17:32:10,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:10,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:10,219 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:10,504 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-07-09 17:32:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:32:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:10,541 INFO L225 Difference]: With dead ends: 18240 [2021-07-09 17:32:10,541 INFO L226 Difference]: Without dead ends: 18233 [2021-07-09 17:32:10,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-07-09 17:32:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-07-09 17:32:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-07-09 17:32:10,995 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-07-09 17:32:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:10,996 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-07-09 17:32:10,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-07-09 17:32:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:11,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:11,002 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:11,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:11,203 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-07-09 17:32:11,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:11,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136372432] [2021-07-09 17:32:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136372432] [2021-07-09 17:32:11,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136372432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19575831] [2021-07-09 17:32:11,282 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 17:32:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19575831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:11,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194213695] [2021-07-09 17:32:11,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:11,355 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:11,747 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-07-09 17:32:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:32:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:11,790 INFO L225 Difference]: With dead ends: 18422 [2021-07-09 17:32:11,790 INFO L226 Difference]: Without dead ends: 18422 [2021-07-09 17:32:11,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:32:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-07-09 17:32:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-07-09 17:32:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-07-09 17:32:12,219 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-07-09 17:32:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:12,219 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-07-09 17:32:12,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-07-09 17:32:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:12,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:12,226 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:12,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,427 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-07-09 17:32:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679558322] [2021-07-09 17:32:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:12,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679558322] [2021-07-09 17:32:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679558322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446770993] [2021-07-09 17:32:12,494 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 17:32:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:12,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:12,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446770993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:32:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560380896] [2021-07-09 17:32:12,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:12,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:12,562 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 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 17:32:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:12,712 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-07-09 17:32:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:12,712 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 22 [2021-07-09 17:32:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:12,751 INFO L225 Difference]: With dead ends: 17724 [2021-07-09 17:32:12,751 INFO L226 Difference]: Without dead ends: 17724 [2021-07-09 17:32:12,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-07-09 17:32:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-07-09 17:32:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-07-09 17:32:13,195 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-07-09 17:32:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:13,195 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-07-09 17:32:13,195 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 17:32:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-07-09 17:32:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:13,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:13,202 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:13,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,402 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-07-09 17:32:13,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:13,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169277542] [2021-07-09 17:32:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:13,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169277542] [2021-07-09 17:32:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169277542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586329320] [2021-07-09 17:32:13,472 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 17:32:13,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:32:13,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:13,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586329320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:13,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:32:13,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988548441] [2021-07-09 17:32:13,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:13,545 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 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 17:32:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:13,816 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-07-09 17:32:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:32:13,816 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 22 [2021-07-09 17:32:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:13,878 INFO L225 Difference]: With dead ends: 17701 [2021-07-09 17:32:13,878 INFO L226 Difference]: Without dead ends: 17697 [2021-07-09 17:32:13,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-07-09 17:32:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-07-09 17:32:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-07-09 17:32:14,364 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-07-09 17:32:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:14,364 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-07-09 17:32:14,364 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 17:32:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-07-09 17:32:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:14,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:14,371 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:14,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-07-09 17:32:14,571 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:14,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-07-09 17:32:14,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:14,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141927495] [2021-07-09 17:32:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141927495] [2021-07-09 17:32:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141927495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041475233] [2021-07-09 17:32:14,640 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 17:32:14,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041475233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:32:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126016488] [2021-07-09 17:32:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:14,701 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 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 17:32:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:14,917 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-07-09 17:32:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:32:14,917 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 22 [2021-07-09 17:32:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:14,956 INFO L225 Difference]: With dead ends: 17251 [2021-07-09 17:32:14,956 INFO L226 Difference]: Without dead ends: 17250 [2021-07-09 17:32:14,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-07-09 17:32:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-07-09 17:32:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-07-09 17:32:15,416 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-07-09 17:32:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,416 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-07-09 17:32:15,416 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 17:32:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-07-09 17:32:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:15,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,423 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-07-09 17:32:15,623 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-07-09 17:32:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591440568] [2021-07-09 17:32:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:15,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591440568] [2021-07-09 17:32:15,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591440568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031613021] [2021-07-09 17:32:15,683 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 17:32:15,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031613021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:15,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:32:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88376017] [2021-07-09 17:32:15,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:15,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:15,756 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 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 17:32:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:15,890 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-07-09 17:32:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:15,890 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 22 [2021-07-09 17:32:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,926 INFO L225 Difference]: With dead ends: 17351 [2021-07-09 17:32:15,926 INFO L226 Difference]: Without dead ends: 17351 [2021-07-09 17:32:15,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-07-09 17:32:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-07-09 17:32:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-07-09 17:32:16,510 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-07-09 17:32:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:16,510 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-07-09 17:32:16,510 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 17:32:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-07-09 17:32:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:16,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:16,518 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:16,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,741 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-07-09 17:32:16,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:16,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308877352] [2021-07-09 17:32:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308877352] [2021-07-09 17:32:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308877352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773616761] [2021-07-09 17:32:16,805 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 17:32:16,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:32:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773616761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:16,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:32:16,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392201421] [2021-07-09 17:32:16,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:16,874 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:17,112 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-07-09 17:32:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:17,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:17,152 INFO L225 Difference]: With dead ends: 17271 [2021-07-09 17:32:17,152 INFO L226 Difference]: Without dead ends: 17269 [2021-07-09 17:32:17,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-07-09 17:32:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-07-09 17:32:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-07-09 17:32:17,659 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-07-09 17:32:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:17,660 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-07-09 17:32:17,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-07-09 17:32:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:17,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:17,671 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:17,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-07-09 17:32:17,896 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-07-09 17:32:17,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:17,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427460495] [2021-07-09 17:32:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427460495] [2021-07-09 17:32:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427460495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14575820] [2021-07-09 17:32:17,957 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 17:32:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:18,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14575820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:18,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:18,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:32:18,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479231126] [2021-07-09 17:32:18,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:18,027 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:18,175 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-07-09 17:32:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:18,211 INFO L225 Difference]: With dead ends: 17397 [2021-07-09 17:32:18,211 INFO L226 Difference]: Without dead ends: 17397 [2021-07-09 17:32:18,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-07-09 17:32:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-07-09 17:32:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-07-09 17:32:18,750 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-07-09 17:32:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:18,751 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-07-09 17:32:18,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-07-09 17:32:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:18,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:18,757 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:18,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-07-09 17:32:18,958 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-07-09 17:32:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:18,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684152809] [2021-07-09 17:32:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:19,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684152809] [2021-07-09 17:32:19,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684152809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713542084] [2021-07-09 17:32:19,045 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 17:32:19,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:19,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713542084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:19,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:32:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392407848] [2021-07-09 17:32:19,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:19,109 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:19,325 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-07-09 17:32:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:19,372 INFO L225 Difference]: With dead ends: 19691 [2021-07-09 17:32:19,372 INFO L226 Difference]: Without dead ends: 19688 [2021-07-09 17:32:19,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-07-09 17:32:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-07-09 17:32:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-07-09 17:32:19,856 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-07-09 17:32:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:19,856 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-07-09 17:32:19,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-07-09 17:32:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:19,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:19,863 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:20,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-07-09 17:32:20,063 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-07-09 17:32:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:20,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549105491] [2021-07-09 17:32:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:20,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549105491] [2021-07-09 17:32:20,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549105491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556696426] [2021-07-09 17:32:20,126 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 17:32:20,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:32:20,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:20,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:20,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556696426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:32:20,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124103354] [2021-07-09 17:32:20,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:20,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:20,198 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:20,372 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-07-09 17:32:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:20,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:20,453 INFO L225 Difference]: With dead ends: 26038 [2021-07-09 17:32:20,453 INFO L226 Difference]: Without dead ends: 26038 [2021-07-09 17:32:20,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-07-09 17:32:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-07-09 17:32:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-07-09 17:32:21,143 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-07-09 17:32:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:21,143 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-07-09 17:32:21,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-07-09 17:32:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:21,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:21,150 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:21,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-07-09 17:32:21,351 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-07-09 17:32:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:21,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119576396] [2021-07-09 17:32:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:21,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119576396] [2021-07-09 17:32:21,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119576396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407756278] [2021-07-09 17:32:21,425 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 17:32:21,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407756278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:21,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:21,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138250222] [2021-07-09 17:32:21,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:21,491 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,724 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 17:32:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:21,871 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-07-09 17:32:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:32:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:21,947 INFO L225 Difference]: With dead ends: 28515 [2021-07-09 17:32:21,947 INFO L226 Difference]: Without dead ends: 28511 [2021-07-09 17:32:21,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-07-09 17:32:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-07-09 17:32:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-07-09 17:32:22,651 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-07-09 17:32:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:22,651 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-07-09 17:32:22,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-07-09 17:32:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:22,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:22,658 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:22,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-07-09 17:32:22,859 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:22,859 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-07-09 17:32:22,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:22,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944032566] [2021-07-09 17:32:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944032566] [2021-07-09 17:32:22,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944032566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156309876] [2021-07-09 17:32:22,928 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 17:32:22,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:32:22,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156309876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:23,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:23,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654874088] [2021-07-09 17:32:23,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:23,000 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:23,230 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-07-09 17:32:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:23,495 INFO L225 Difference]: With dead ends: 26560 [2021-07-09 17:32:23,495 INFO L226 Difference]: Without dead ends: 26560 [2021-07-09 17:32:23,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-07-09 17:32:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-07-09 17:32:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-07-09 17:32:24,179 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-07-09 17:32:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:24,179 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-07-09 17:32:24,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-07-09 17:32:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:24,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:24,186 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:24,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:24,387 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-07-09 17:32:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:24,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313407917] [2021-07-09 17:32:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:24,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313407917] [2021-07-09 17:32:24,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313407917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752631554] [2021-07-09 17:32:24,461 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 17:32:24,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:32:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752631554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480414840] [2021-07-09 17:32:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:24,534 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:24,805 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-07-09 17:32:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:24,872 INFO L225 Difference]: With dead ends: 26225 [2021-07-09 17:32:24,872 INFO L226 Difference]: Without dead ends: 26220 [2021-07-09 17:32:24,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-07-09 17:32:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-07-09 17:32:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-07-09 17:32:25,538 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-07-09 17:32:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:25,538 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-07-09 17:32:25,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-07-09 17:32:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:25,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:25,545 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:25,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,746 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-07-09 17:32:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:25,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124310917] [2021-07-09 17:32:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:25,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124310917] [2021-07-09 17:32:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124310917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376579092] [2021-07-09 17:32:25,822 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 17:32:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376579092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:25,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:25,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982373188] [2021-07-09 17:32:25,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:25,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:25,892 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:26,246 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-07-09 17:32:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:26,332 INFO L225 Difference]: With dead ends: 28702 [2021-07-09 17:32:26,332 INFO L226 Difference]: Without dead ends: 28702 [2021-07-09 17:32:26,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-07-09 17:32:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-07-09 17:32:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-07-09 17:32:27,057 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-07-09 17:32:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:27,057 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-07-09 17:32:27,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-07-09 17:32:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:27,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:27,064 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:27,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-07-09 17:32:27,265 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-07-09 17:32:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:27,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61339233] [2021-07-09 17:32:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61339233] [2021-07-09 17:32:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61339233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740857228] [2021-07-09 17:32:27,341 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 17:32:27,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:27,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740857228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:27,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:27,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134654424] [2021-07-09 17:32:27,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:27,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:27,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:27,411 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:27,865 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-07-09 17:32:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:32:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:27,942 INFO L225 Difference]: With dead ends: 28805 [2021-07-09 17:32:27,943 INFO L226 Difference]: Without dead ends: 28799 [2021-07-09 17:32:27,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-07-09 17:32:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-07-09 17:32:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-07-09 17:32:28,668 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-07-09 17:32:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:28,668 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-07-09 17:32:28,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-07-09 17:32:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:28,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:28,676 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:28,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-07-09 17:32:28,877 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-07-09 17:32:28,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:28,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973322380] [2021-07-09 17:32:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:28,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973322380] [2021-07-09 17:32:28,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973322380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076261393] [2021-07-09 17:32:28,950 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 17:32:28,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:32:28,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076261393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:29,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268955304] [2021-07-09 17:32:29,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:29,023 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:29,321 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-07-09 17:32:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:32:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:29,406 INFO L225 Difference]: With dead ends: 29601 [2021-07-09 17:32:29,406 INFO L226 Difference]: Without dead ends: 29601 [2021-07-09 17:32:29,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-07-09 17:32:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-07-09 17:32:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-07-09 17:32:30,351 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-07-09 17:32:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:30,351 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-07-09 17:32:30,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-07-09 17:32:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:30,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:30,360 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:30,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-07-09 17:32:30,561 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-07-09 17:32:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:30,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315553458] [2021-07-09 17:32:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:30,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315553458] [2021-07-09 17:32:30,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315553458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116220678] [2021-07-09 17:32:30,643 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 17:32:30,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116220678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611103047] [2021-07-09 17:32:30,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:30,710 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:30,981 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-07-09 17:32:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:31,064 INFO L225 Difference]: With dead ends: 29739 [2021-07-09 17:32:31,065 INFO L226 Difference]: Without dead ends: 29732 [2021-07-09 17:32:31,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-07-09 17:32:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-07-09 17:32:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-07-09 17:32:32,000 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-07-09 17:32:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:32,000 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-07-09 17:32:32,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-07-09 17:32:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:32,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:32,011 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-07-09 17:32:32,212 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-07-09 17:32:32,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459713668] [2021-07-09 17:32:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:32,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459713668] [2021-07-09 17:32:32,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459713668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783993135] [2021-07-09 17:32:32,288 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 17:32:32,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783993135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423991018] [2021-07-09 17:32:32,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:32,366 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:32,864 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-07-09 17:32:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:32:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:32:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:32,950 INFO L225 Difference]: With dead ends: 29939 [2021-07-09 17:32:32,950 INFO L226 Difference]: Without dead ends: 29939 [2021-07-09 17:32:32,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:32:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-07-09 17:32:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-07-09 17:32:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-07-09 17:32:33,714 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-07-09 17:32:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:33,714 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-07-09 17:32:33,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-07-09 17:32:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:33,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:33,723 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:33,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,924 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-07-09 17:32:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:33,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248289703] [2021-07-09 17:32:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248289703] [2021-07-09 17:32:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248289703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853267061] [2021-07-09 17:32:34,126 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 17:32:34,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:32:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:32:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853267061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:34,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-09 17:32:34,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768339959] [2021-07-09 17:32:34,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:34,195 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 17:32:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:34,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-07-09 17:32:34,537 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:32:34,540 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:32:34,541 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:32:34,541 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:32:34 BasicIcfg [2021-07-09 17:32:34,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:32:34,542 INFO L168 Benchmark]: Toolchain (without parser) took 852976.76 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 175.8 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-09 17:32:34,542 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 196.1 MB. Free memory is still 176.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:32:34,542 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 196.1 MB. Free memory was 175.7 MB in the beginning and 174.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:32:34,543 INFO L168 Benchmark]: Boogie Preprocessor took 17.93 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.3 MB in the end (delta: 982.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:32:34,543 INFO L168 Benchmark]: RCFGBuilder took 301.00 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 156.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:32:34,543 INFO L168 Benchmark]: TraceAbstraction took 852625.10 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 155.6 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-07-09 17:32:34,547 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 196.1 MB. Free memory is still 176.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 196.1 MB. Free memory was 175.7 MB in the beginning and 174.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.93 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.3 MB in the end (delta: 982.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 301.00 ms. Allocated memory is still 196.1 MB. Free memory was 173.2 MB in the beginning and 156.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 852625.10 ms. Allocated memory was 196.1 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 155.6 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (29574states) and FLOYD_HOARE automaton (currently 18 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (1048 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: 852558.2ms, OverallIterations: 214, TraceHistogramMax: 11, EmptinessCheckTime: 917.4ms, AutomataDifference: 56620.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4878 SDtfs, 17774 SDslu, 30650 SDs, 0 SdLazy, 31878 SolverSat, 4721 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13864.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8422 GetRequests, 3952 SyntacticMatches, 97 SemanticMatches, 4373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23083 ImplicationChecksByTransitivity, 28174.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 4132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71388.1ms AutomataMinimizationTime, 213 MinimizatonAttempts, 158311 StatesRemovedByMinimization, 206 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 722.2ms SsaConstructionTime, 2511.9ms SatisfiabilityAnalysisTime, 672341.4ms InterpolantComputationTime, 8467 NumberOfCodeBlocks, 8466 NumberOfCodeBlocksAsserted, 972 NumberOfCheckSat, 8042 ConstructedInterpolants, 0 QuantifiedInterpolants, 35948 SizeOfPredicates, 143 NumberOfNonLiveVariables, 17081 ConjunctsInSsa, 3015 ConjunctsInUnsatCore, 425 InterpolantComputations, 3 PerfectInterpolantSequences, 7250/21264 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